Malicious PDF — malware analysis report

Static analysis result for SHA-256 38f1c20d52227114…

MALICIOUS

PDF

97.7 KB Created: 2021-09-07 12:16:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 74cf6dce0f98bfd27f95cb8aec2f2cad SHA-1: 0d1e23eecc6fd752cdfb0e8013fb6f81c2e488bf SHA-256: 38f1c20d52227114568dd3d58e6b812f6d4b02b01b66c258148e4b14623c3c5d
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple domains, many of which are hosted on compromised CMS upload storage or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution through these links. The document body is largely unreadable binary data, offering no direct content-based clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 6

  • 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.
  • 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://gazdalkodjokosan.hu/img/userfiles/file/sepodutit.pdf In PDF document text
    • https://studiopros.com/userfiles/file/In PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081f708d2075---10616424895.pdfIn PDF document text
    • https://marathonblainville.com/userfiles/files/62942752243.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/acoqlvm6mh6i72hnmll9ku1vs0/19892040231.pdfIn PDF document text
    • http://pro-group.ru/userfiles/files/27473909336.pdfIn PDF document text
    • http://omak1968.com/clients/71178/File/49639707862.pdfIn PDF document text
    • http://kowel.com/ckfinder/userfiles/files/1622894311.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160bd070246c84---lexaxetotutefarezatinimep.pdfIn PDF document text
    • http://slp72.com/clients/7/7b/7b902bee17765b19ebdde6030f24742d/File/lapulawex.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/51d25f48b54f27ef54bc7500f995833e/zajaguf.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097a7b88c535---6227375622.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/c86pvk7jlv0napr1h4105mfha3/54897726504.pdfIn PDF document text
    • http://csc0535.com/userfiles/file/20210819080603_g5bf38.pdfIn PDF document text
    • http://goodslib.com/userfiles/files/wejafawosiruwowe.pdfIn PDF document text
    • http://onlinemidias.com/ckfinder/userfiles/files/73665278887.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf33c24c634---dusipizewasujefus.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/ncqa127855rr1uc6e2htkgvbn5/gadogifiziriwujanozopike.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613010087413a---solaxatoxapuw.pdfIn PDF document text
    • http://skogsformedling.se/bilder_umeny/File/32847874965.pdfIn PDF document text
    • https://anjingliar2.com/contents//files/88137375979.pdfIn PDF document text
    • http://austria-ex.com/images/blog//file/kivenuvobomokilolop.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/is2oveguicubhubfae5d8sti40/zibakulit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=soteriology+the+doctrine+of+salvation+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_off0001163d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1163D 11156 bytes
SHA-256: b1424c42f50205857c5bffd434f0afc308a0c217a96c6f66a26149106224f416
font_01_sfnt_off0001300f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1300F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14821 18904 bytes
SHA-256: 7888d0d24187e06f027e891f934d45516b8ea48825a2a05e755c75618c2c8ce6

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