Malicious PDF — malware analysis report

Static analysis result for SHA-256 07cb3d6986ecabda…

MALICIOUS

PDF

74.9 KB Created: 2021-03-14 05:51:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 89c26a3469a7305b919097bd53248479 SHA-1: 5f28df6c0911ebe631417420f8faae95ac99ad0d SHA-256: 07cb3d6986ecabda612fd2ee2ef13684e2a065d4f259ad8777de666e9079670d
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-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://dugedepap.ru/wix?keyword=domestic+violence+shelters+idaho PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486033/normal_6023b39ce27e8.pdfIn PDF document text
    • http://runiruvuzez.iblogger.org/sulixepusatojuxek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415052/normal_6017dd12031fe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416510/normal_5fca0177b44a3.pdfIn PDF document text
    • https://cdn.sqhk.co/torevebeti/ih6heiD/pacman_frog_habitat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393180/normal_5fd08f0caa791.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413986/normal_5fd04a2cb69d3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369505/normal_5fdf2c7edf22b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444096/normal_5fd6628bc163c.pdfIn PDF document text
    • http://sesobejajanasak.iblogger.org/nonatuzopemipaguz.pdfIn PDF document text
    • https://cdn.sqhk.co/konumapedowe/Mjb9jgc/98974535276.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pitidurafekuji.rf.gd/what_is_on_the_taco_bell_secret_menu.pdfIn PDF document text
    • https://ea64ff4c-51e6-4efc-8cc1-399682447901.filesusr.com/ugd/961f18_a24d0389f4db4ef0adc5316ef4f122be.pdf?index=trueIn PDF document text
    • http://feloxokarapuj.rf.gd/mefegi.pdfIn PDF document text
    • http://xefavab.rf.gd/mafogativ.pdfIn PDF document text
    • https://7162f0c1-3bb2-4775-9ad2-1e34613fb889.filesusr.com/ugd/595093_8b8782b623cd4d0cad3300b79880d0c8.pdf?index=trueIn PDF document text
    • http://bulujulu.rf.gd/i_robot_2004_movie_review.pdfIn PDF document text
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_daa84539a69a49c38c571a9a32787639.pdf?index=trueIn 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_off0000e760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE760 5236 bytes
SHA-256: 1f7997bb07b89574513bbf9ba4d4af7222c9dd7bf0d848df15a099c897b65ed2
font_01_sfnt_off0000f90b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90B 11048 bytes
SHA-256: 7f57722781dd65fe157a48f548855e766e0bcb8df95023a4dd3869efa1af095e

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