Malicious PDF — malware analysis report

Static analysis result for SHA-256 96e6abaa473fcfd3…

MALICIOUS

PDF

68.5 KB Created: 2021-01-26 20:11:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: db59aa17988e49d886c1e9decadd5938 SHA-1: 81dd2f95e0aeaab0d8ada81b73279d7bfc641d2e SHA-256: 96e6abaa473fcfd33c9b84ff5a9348ea69a560688de07c1f8ed725ca8e155978
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files. The ClamAV detection and ML classifier strongly indicate maliciousness. The primary purpose appears to be directing users to a link farm, potentially for SEO abuse or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/123?utm_term=stats+modeling+the+world+chapter+7+scatterplots+association+and+correlation+answers PDF link annotation
    • https://zomerasojukoluw.weebly.com/uploads/1/3/4/7/134769652/migax.pdfIn PDF document text
    • http://igcopyrightverify.com/xujati7nbem.pdfIn PDF document text
    • http://gta-msk.ru/roswell_umc_staffwour3.pdfIn PDF document text
    • https://zipufalazuviw.weebly.com/uploads/1/3/1/8/131856517/1c897c.pdfIn PDF document text
    • https://kawapojironene.weebly.com/uploads/1/3/1/6/131637385/xudaladobil_gajemobakur_vifizijagelufod_bogiwutax.pdfIn PDF document text
    • http://cookwellbakewell.com/pemenowabukabadevofjyy3.pdfIn PDF document text
    • https://tebojizo.weebly.com/uploads/1/3/1/4/131406069/kijavusolimez.pdfIn PDF document text
    • https://cdn.sqhk.co/videgogaf/jhgdigZ/61124231371.pdfIn PDF document text
    • http://circleshtang.xyz/chargepoint_home_flex_reviewlf5r6.pdfIn PDF document text
    • https://woxukobu.weebly.com/uploads/1/3/4/3/134392577/3367312.pdfIn PDF document text
    • http://ovca.space/85396743209nj9k2.pdfIn PDF document text
    • https://bebemabuvi.weebly.com/uploads/1/3/1/4/131453051/4449422.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jebokizez/pefelapesazukifugu.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/vaxuvoviju.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/56870545015.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/lovely_video_songs_free.pdfIn PDF document text
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA6 5764 bytes
SHA-256: abf3e43b5ff0380e7dbbb6e2e008927b392f25f632f9d8f3952be51bbe50f17b
font_01_sfnt_off0000df30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF30 10796 bytes
SHA-256: 90a8766052b37d5795769f5e4f0c18e77d9ec06b4593b1879448f041ba4bc9fa

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