Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad29d90a855be5bc…

MALICIOUS

PDF

72.3 KB Created: 2021-03-30 15:19:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d02b9753f015a0f5ee58c332756bd30d SHA-1: d5cc1eabd044104d2b096614e410b181b3455926 SHA-256: ad29d90a855be5bc5586f71e7a61282227b922c34d898165ada71b1a3024170f
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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/award?keyword=algebraic+fractions+pdf PDF link annotation
    • https://sitoluvumoroge.weebly.com/uploads/1/3/4/7/134762666/6645287.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424985/normal_5fe05c66bdf99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369651/normal_60214135c004e.pdfIn PDF document text
    • https://jodudetejad.weebly.com/uploads/1/3/0/7/130775984/powuza-nibibuda-kixekaxajirawi-jotesul.pdfIn PDF document text
    • https://zojegidaluvimov.weebly.com/uploads/1/3/4/1/134109086/ee71a2ed.pdfIn PDF document text
    • https://saworajopasu.weebly.com/uploads/1/3/0/7/130775294/kokuxuzaxina.pdfIn PDF document text
    • https://pegiromilu.weebly.com/uploads/1/3/4/6/134683304/1038058.pdfIn PDF document text
    • https://febapemideb.weebly.com/uploads/1/3/0/7/130738739/basokoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468531/normal_605d86bd35d1d.pdfIn PDF document text
    • https://zapidowezagija.weebly.com/uploads/1/3/4/0/134041255/5aa44cdaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379241/normal_605ee13e17883.pdfIn PDF document text
    • https://kegewibenufugix.weebly.com/uploads/1/3/2/6/132682471/3544443.pdfIn PDF document text
    • https://gamidamivagug.weebly.com/uploads/1/3/5/3/135324690/jitubega.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/0c1349ca-0d3b-45c8-a139-361072fa9417/geometry_basics_worksheet_answers_gina_wilson.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22b2487f-56a0-4171-86f5-f83c98d32156/xedawimisaj.pdfIn PDF document text
    • http://xotaxebotejij.rf.gd/17605738620.pdfIn PDF document text
    • http://zovopabipani.rf.gd/pumujugusosep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e664bb0d-4501-43c6-ac1f-fddf13bf0965/how_to_get_a_realtor_license_in_colorado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51f0bd9b-460d-44a3-b896-ea7276768ffa/45584501236.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c91d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC91D 5452 bytes
SHA-256: e76b2d7e7cbd083f2fed86c0f9f71bca9aa0af09a89ff96f996c5af81848c219
font_01_sfnt_off0000dbb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB3 10424 bytes
SHA-256: f094ae7432fc14b42abe61147734bf6a5cedab67efd030f360729a0d446c71da
font_02_sfnt_off0000ffac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAC 16036 bytes
SHA-256: 149cab45689013e99d1aa520d2e5234663aa5d8577b6aae5e423b5d60aeda4c1

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