Malicious PDF — malware analysis report

Static analysis result for SHA-256 babdfcd29e68d6be…

MALICIOUS

PDF

71.1 KB Created: 2021-09-04 19:19:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d3dedcd89ac086db93c5954fcc20e0ce SHA-1: 40dbc3c90bd854d6e3548b2ea67b10baa6054f54 SHA-256: babdfcd29e68d6be59cf21aa84d09921fc9f51d3cb19c04b87f290c6046f44fe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and numerous external URLs indicate an attempt to lead the user to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 https://pfhotel.gr/ckfinder/userfiles/files/4538677084.pdf In PDF document text
    • https://fototipia.hu/files/files/70273981680.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/bff6fa15550a3d950639e3451017f002/78619156375.pdfIn PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/tanuwukodefur.pdfIn PDF document text
    • http://retco.ge/ckfinder/userfiles/files/53534304831.pdfIn PDF document text
    • http://hotelclinton.it/userfiles/files/xapanap.pdfIn PDF document text
    • https://prosaison.fr/userfiles/files/26361419464.pdfIn PDF document text
    • http://acrclubinversores.com/files/galeria/files/16858738870.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/d5302c120d4a470fe4e6d78b93c182fb/99667045143.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16089925ecfdd1---zetenewuroluresef.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/kuaodbf104ta3nj2bvrbus3o04/88288407648.pdfIn PDF document text
    • https://anandamsanyal.com/userfiles/file/nogiwij.pdfIn PDF document text
    • https://legyenegyjonapod.hu/userfiles/files/pevebomu.pdfIn PDF document text
    • https://ivanamihic.com//files/tozolakenes.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160841acc71baf---jegin.pdfIn PDF document text
    • https://3drm.bg/uploads/pictures/files/94670327724.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/ibp8v9nte8q0hbifm5rk4pqk44/94167513055.pdfIn PDF document text
    • http://uhy-th.com/image/upload/files/89861796398.pdfIn PDF document text
    • http://megalaserasia.com/upload///gamiwelisuteb.pdfIn PDF document text
    • https://zzhqhi.com/d/files/29041981255.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/56b4329389ae2a63b24f1ea809e2263d/66881829357.pdfIn PDF document text
    • https://cristalensi.com/public/File/25048948318.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=combination+and+permutation+examples+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_off0000b617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB617 15536 bytes
SHA-256: b1fdb05b6c7f670e68a8f4fac5de4ace5b52a3afb9c0b77958f3992c1a81e4c1
font_01_sfnt_off0000dcea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF501 11032 bytes
SHA-256: bee5a7e0338f36e48a8c71932ff03d4395b1a1b3fc4fb4a25ccfd02babb707e0

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