Malicious PDF — malware analysis report

Static analysis result for SHA-256 a87761bca4d522af…

MALICIOUS

PDF

85.3 KB Created: 2021-03-10 06:52:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7abc746bdd74fd3912df04ffa1e635d0 SHA-1: 6a3587027e32aeeac7ced847c80c99c231b528ef SHA-256: a87761bca4d522af7ee068a479dead8dcad9d709ddabaa42cea66c0e5062e544
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 0.9997

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://leonvi.ru/award?keyword=essential+managers+effective+communication+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4412165/normal_5ffa1efb2b8b4.pdfIn PDF document text
    • http://faxejurimuzuret.22web.org/molonolutokidilipubiratu.pdfIn PDF document text
    • https://cdn.sqhk.co/fazejitev/hPmqwhj/fabfitfun_promo_code_honey.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388165/normal_5fc9a3b0144a5.pdfIn PDF document text
    • http://bewizevamud.iblogger.org/so_because_although_worksheet.pdfIn PDF document text
    • http://jelesanu.iblogger.org/kokujitu.pdfIn PDF document text
    • https://cdn.sqhk.co/rorajakura/jahihSX/business_plan_outline_ppt.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/wutogugej/mentor_calibre_xrc_manual.pdfIn PDF document text
    • http://memajale.epizy.com/rise_of_kingdoms_beginner_guide.pdfIn PDF document text
    • https://de7eff9d-5c50-4122-bb99-ee112abf7a8f.filesusr.com/ugd/db8f21_febc15b67973469bbef04e98386a6c1e.pdf?index=trueIn PDF document text
    • http://musajebumo.rf.gd/76462755090.pdfIn PDF document text
    • https://f8071fb1-33dc-4bb9-9fe9-292e0ca0d861.filesusr.com/ugd/253000_e086e7c4ea6a4c9da6a86c515c8dc205.pdf?index=trueIn PDF document text
    • https://e24ff460-1725-4b9d-a7de-f8438c38fea0.filesusr.com/ugd/366850_5fdffd4b15c84da2b2d7642ecf678622.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/toxic_wap_black_panther_movie.pdfIn PDF document text
    • http://rivebop.epizy.com/25450554107.pdfIn PDF document text
    • http://jatomije.rf.gd/my_cloud_mirror_installation.pdfIn PDF document text
    • http://betefaxepuj.rf.gd/redir.pdfIn PDF document text
    • http://xarezebabanadot.epizy.com/surah_yasin_indonesia.pdfIn PDF document text
    • https://ca30e0e0-ecf2-44ab-b6a2-fe26291458be.filesusr.com/ugd/34e21e_5e9314daa59a41799e53910eebaecf3f.pdf?index=trueIn PDF document text
    • http://venakato.epizy.com/lunaligugejoxudale.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7C 5492 bytes
SHA-256: c63e5be408b7b07d56d66e15ff81f7ff075761734562567689b3105fa5da89a4
font_01_sfnt_off00012125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12125 11268 bytes
SHA-256: ac9e460d7f2ab8a32d058023e2eed4574fcbacb4fe36484f41a989089b1cbcbd

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