Malicious PDF — malware analysis report

Static analysis result for SHA-256 24c147366931fff4…

MALICIOUS

PDF

86.0 KB Created: 2021-06-24 11:17:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d2dca7d9100f47539db100fae3ce1598 SHA-1: e81456098b2ec6e4f516670d382a7d9d9b7508be SHA-256: 24c147366931fff4c7711538041a4da8d4d0103198f8d258448c53bd68d1a345
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zulaikhatextile.com/userfiles/files/kipin.pdf In PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb7ad39516---gafusaga.pdfIn PDF document text
    • http://world-green-hope.com/uploads/files/toretutokavelenam.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ca4ab9107---37348697158.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160838eb386f2e---godajidafitesupiji.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/86012641556.pdfIn PDF document text
    • https://fotofidelity.cz/userfiles/file/90172379579.pdfIn PDF document text
    • http://arcos-eff.it/userfiles/files/desodi.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792724b7918---80171073833.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a72e1dd8d---vofuvedunusitedavulo.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b84fa717bf2---xuzos.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b09e37cfed---69908913605.pdfIn PDF document text
    • https://capecoralliving.com/media/file/metozoritowifapo.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/ab1d8167db0b2c593d9eba450f63cdc3/xasononuwatajo.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/geterurubatutenovativ.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=astm+a106+grade+b+chemical+composition+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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF62 5832 bytes
SHA-256: cbce296d92758cc237eb9291cd39d7f44a29b56834d21fb9d205dcf3b179b51e
font_01_sfnt_off00011301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11301 11724 bytes
SHA-256: 266bec7a50267d692be47a40f3c03a7095d13c2099c447e50c33478c0be7a19c
font_02_sfnt_off00013acb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ACB 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176