Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cb1104f30288d7a…

MALICIOUS

PDF

81.6 KB Created: 2021-03-29 13:09:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c0f29102fa93da9bdf9a2230c9355cd2 SHA-1: da6cdfbd0d3a205d4f70da6ca283fdf4b9e71d93 SHA-256: 8cb1104f30288d7a0344eb604faed06e475bd6246ebfb60517f54b10fc2637b6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://fokemale.ru/wix?keyword=west+quad+study+rooms PDF link annotation
    • http://pixell.store/gexibivilazkr8q5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390684/normal_5feb04645e481.pdfIn PDF document text
    • http://lnstagramverificationbadge.com/lekoledugwasvv.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizufofuj/iid2xPu/xekimiwateduloxixonodo.pdfIn PDF document text
    • http://sesalon.xyz/15123546399som3o.pdfIn PDF document text
    • https://cdn.sqhk.co/tirabipati/qKQykge/wotexisowegigamajo.pdfIn PDF document text
    • http://guitar.su/190749666908q12.pdfIn PDF document text
    • https://cdn.sqhk.co/remonupode/dEgiB6H/vikorazesagiw.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449399/normal_601b601fe609c.pdfIn PDF document text
    • https://cdn.sqhk.co/gusoguribus/Ohjhjif/newipelitotugezexozido.pdfIn PDF document text
    • http://spindlndou.space/masha_e_urso_portugues_portugalkl4ys.pdfIn PDF document text
    • http://cabinetsly.xyz/774668442100iop1.pdfIn PDF document text
    • http://csxmoney.info/5960222579f4m88.pdfIn PDF document text
    • http://yesnutural.space/dufiriridq31v.pdfIn PDF document text
    • https://cdn.sqhk.co/suzeboxiwo/gxjgphc/xulaxubinetazebow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/87a8fa60-e1a4-4342-88fb-9f6af19723ae/51259458779.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e322f350-6e3d-47e9-b94f-c876fe8b20c1/46275022502.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea3d13b4-4a3f-4da8-9974-d9441dfc7880/86387493220.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afc24e53-2508-4ff7-a9b0-7a055daa455f/jukarotabaleb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93791e42-b5de-47d5-b690-13d4b9e0d015/29727736304.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/979c4e18-ae2c-4a6b-af90-13f9d1b5045e/what_is_the_romeo_and_juliet_law_in_california.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_off0000ffbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBC 5180 bytes
SHA-256: ea56072bf2e481c9d0a6085b4650061b449a6fad531a25bdb10626da706ea654
font_01_sfnt_off00011154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11154 11884 bytes
SHA-256: c053fe2884738079fd008343928d5210bece7bfe151ea8a5e52739fae704268c

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