Malicious PDF — malware analysis report

Static analysis result for SHA-256 3914116e21429794…

MALICIOUS

PDF

121.2 KB Created: 2021-07-03 02:31:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 9003f60b3b60d21dff96db27fd693215 SHA-1: 12df2d7e49638de98df5704fec75117c79b3a9ad SHA-256: 3914116e21429794d21e27699567f789ae2529fc6b6efc4049b945fe58585de3
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classification and ClamAV, with heuristics indicating it's a link farm pointing to compromised WordPress upload storage. The document's structure and embedded URLs suggest a callback phishing or tech-support scam, aiming to trick users into calling a fraudulent phone number. No scripts were extracted, but the overall pattern strongly suggests a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aca4fd8fafc---tajefiwowulozad.pdf In PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d32de43c3f---74275705042.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/d9dd4a5ab6d0f3037b647d0a5afff1a3/tatoberimomifijosuti.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160a7dbff1683d---nevomepefemafidafu.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16092db96cfc90---nikowu.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de231fd6c7c---17558974809.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609adef45f394---47731157977.pdfIn PDF document text
    • http://elite-nails.pl/Upload/file/65793408926.pdfIn PDF document text
    • http://awkontrakt.pl/ckfinder/userfiles/files/zebapopotubirabaluwi.pdfIn PDF document text
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/49787164391.pdfIn PDF document text
    • http://fantalife.nl/userfiles/file/jarusofarafaza.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/5a59002614516e881ac8eaeaea5e2375/44550949486.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/zigufinaxazunopa.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9cf9751fc---71713354055.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099a2fc043f8---9766444726.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7f09d159d8190785ee148f33c9934d36/70889563665.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/jitaduvevulutalinukolej.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b30dc8778---36628724149.pdfIn PDF document text
    • http://dohertylaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mimebogul.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a267ef3d059---3400379337.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/nixerek.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6acc4920d---tesowokowidatumipafidi.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/pabgcoqfhnre09cthplhbk19pu/29209228903.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16080f5acc73ae---simazekejozipeguzinutoza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=meaning+of+neighbouringPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000108d9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x108D9 23248 bytes
SHA-256: 0f852c49ddd02fea23cb9e46e87284066d26ed680d307c9c382e125b3288c542
font_01_sfnt_off00013383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13383 10416 bytes
SHA-256: eb082a05fefacefc6296e297a440cc0fd8c3ae164f8909962a3f9ada6f7803a4
font_02_sfnt_off00014af2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AF2 7632 bytes
SHA-256: 3610caaa72086ddfd52b9533df99c7fd88a0986f0bcafd745d45f0c99c95d5cd
font_03_sfnt_off00016526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16526 38764 bytes
SHA-256: c19a142f4e0daa78e2d5202cd7ce09b196ece5aa8352e256bb9505e5b834b49f
font_04_sfnt_off0001be9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BE9B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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