Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c7a2594f2366362…

MALICIOUS

PDF

113.0 KB Created: 2021-08-04 21:57:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7bacd209ec160c84f8054eb7097393f7 SHA-1: 0c9fe93f45d283447066c61ebe86bef806319f6e SHA-256: 9c7a2594f2366362ebe784efeb651c6c49293eba880fb897932e930af5485fd7
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of PDF heuristics related to link farms and compromised CMS uploads, combined with invoice/payment lure indicators, suggests a phishing or social engineering attack. The document likely attempts to trick the user into downloading a secondary payload hosted on compromised websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 8

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/70qisa9okrqaq1frapr39sq0u1/jatirabo.pdf In PDF document text
    • http://pwmtqatar.net/userfiles/file/sagezu.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16077bfdb71766---34018932748.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/d9mnf1dbjaq3qtf33iqv8bnphk/pufeperegukuzoj.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/84682536868.pdfIn PDF document text
    • http://sattosushi.com/uploads/files/dosiwalovusipagizume.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/jewemutiwagowoluw.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/t9cs0h2mhtnrm6mf1qg4h149f8/pulewaxesatenepolugilikaw.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/3aa8a19e068771c067c9c10eeeb20edb/67739954699.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/22c8ff0f671a8aed2011497fb442a0d3/18289831287.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee2217e479d---gozokiger.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/3u2fc46gak9q9beh5fsde5md86/lurudokezawusuworowuxa.pdfIn PDF document text
    • http://for284.org/clients/7/74/7452b259410349f427184d5eaa48bde7/File/24413047247.pdfIn PDF document text
    • http://jarosi.hu/files/file/dubetedoziwomutenori.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/hvnpa3dp5ul5a5jfp6c3sv5st5/runuge.pdfIn PDF document text
    • https://laughteronlineuniversity.com/images/upload/files/63456394649.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/a615a908c1572fc0dd82791f481f2fc0/8456387416.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160f038d739a6d---48721109912.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/d10ca274577f4103cc4df44c10fb9972/92565311683.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160abb11f4fb28---dutabopozegepigukudoxa.pdfIn PDF document text
    • http://michelesherrinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zabijorikefevaroxaxikis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=feasibility+study+sample+for+bakery+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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000157f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00017006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17006 16872 bytes
SHA-256: 35929f89658762addb33cf2ae953ec8106db8e92a101178f302457ecb08bd3e2
font_02_sfnt_off00019bf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19BF4 10976 bytes
SHA-256: 2a3b7628c5c18719ea640089ffa51ad82b597a0c39508ea6e104f8c258136a10

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