Malicious PDF — malware analysis report

Static analysis result for SHA-256 46d16b874be794c1…

MALICIOUS

PDF

79.0 KB Created: 2021-09-05 02:02:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0be89c626896ca92c8006c3928162ff1 SHA-1: 5d2b834b5f8a8b5baa7a5c8c6eec23a74a6c3f60 SHA-256: 46d16b874be794c1666cf30aea19d8831f165512dec81efa6ea7c598ed22cacb
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it's part of a link farm on compromised WordPress sites. The document body is heavily obfuscated, but the presence of numerous URLs pointing to PDF files suggests a phishing or scam attempt to trick users into downloading malicious content. The SE_CALLBACK_LURE heuristic further supports a phishing context.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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) 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://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b1e4b6da855---wuxufepebaxuzosalejixur.pdf In PDF document text
    • https://podimercrm.com/img/files/ziginegesa.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/7ef45e32801fca6e784100ef80e9ce99/85188101157.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a88bc924c5d---jagenikomubevedizesiki.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f0033e82f4a---48470279856.pdfIn PDF document text
    • https://unibel.pl/pliki/upload/file/jikigezureliz.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/4ddfe2f0fef6ec82feb90469ce63eaff/kufipoxinunemujepaviz.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/poguve.pdfIn PDF document text
    • https://atpl.aero/ckfinder/userfiles/files/gesoti.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a744c96b03---pajowogebupareme.pdfIn PDF document text
    • http://globalroomplus.com/bot/ckfinder/uf/files/85681975060.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b5a7c7865f---7512038287.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/9l43r9ocho7nfik1fk7qak4471/jewixawenif.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/fc97efa4480135551a077cb79f5aca50/44976740808.pdfIn PDF document text
    • http://www.toeterloeh44.de/files/5754289776.pdfIn PDF document text
    • http://ubestsports.com/imager/files/20210802234335.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/kenokiwu.pdfIn PDF document text
    • https://traveletrust.com/basefile/traveletrustcom/files/96670923775.pdfIn PDF document text
    • http://maternites-catholiques.org/ressource/site-image/files/vojulisijuxagaz.pdfIn PDF document text
    • https://editions-tlp.fr/ckfinder/userfiles/files/lolujodarafib.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/22c135ec8d6bbdd6f43d329fa599dbf3/42118441077.pdfIn PDF document text
    • http://wami.cc/data/files/21327543808.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=vsepr+practice+pdfPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e9fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FC 17428 bytes
SHA-256: d06b5fe70e8a5a17c97d58c899d51e2a4a192d73beaaf0076937f6200419e629
font_02_sfnt_off0001176e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1176E 10312 bytes
SHA-256: bbc6cf8d7097f245f6c5c2ca2103a61e44999724a6ad556e5adf54dfab5d88f4

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