Malicious PDF — malware analysis report

Static analysis result for SHA-256 c693e1eb061537e6…

MALICIOUS

PDF

78.1 KB Created: 2020-12-25 11:40:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 713746eb98299173fe1e26070541804b SHA-1: 90dd785713eb360e35ff5f11f9b5d44ee17150fa SHA-256: c693e1eb061537e6d27f65fd6feda84ecfb17f22fd944786b30bf5f44d909eb3
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 6

  • 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 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.
  • 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://traffine.ru/strik?utm_term=ding+dong+musician PDF link annotation
    • https://vakesefujes.weebly.com/uploads/1/3/0/7/130739027/mobinedowu.pdfIn PDF document text
    • https://kilekefaze.weebly.com/uploads/1/3/4/6/134631798/69990334.pdfIn PDF document text
    • https://xidoferowugefu.weebly.com/uploads/1/3/4/3/134348033/xiteledovudopi.pdfIn PDF document text
    • https://cdn.sqhk.co/zenetofuma/iegcje5/42998216385.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/r3hhFjb/8832499881.pdfIn PDF document text
    • https://cdn.sqhk.co/ratijojitud/ie5jfFz/52198846482.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368225/normal_5f98f39877213.pdfIn PDF document text
    • https://xalipifizipig.weebly.com/uploads/1/3/1/3/131379045/tolajisaxela.pdfIn PDF document text
    • https://cdn.sqhk.co/pimibopugugo/hjUgfhg/vudesitujevexek.pdfIn PDF document text
    • https://tonuwuro.weebly.com/uploads/1/3/0/7/130739505/vesisaga.pdfIn PDF document text
    • https://cdn.sqhk.co/zixajofazadi/7hiibKa/86360648523.pdfIn PDF document text
    • https://cdn.sqhk.co/gemadaruvow/hftgjjf/pajexuximibuwozobuxev.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/41e3680c-1b85-4f7d-8cc3-559064f690b2/liwonivegeseb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4586691-5926-4589-ba3f-9b87fed4fbc2/pogutarepaxusimomadevu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0678bb98-3e35-458e-8ec6-4142859b2d52/zafaxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/038d4443-6974-4d56-9b75-8619bd00c458/comcast_xfinity_channel_guide.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE52 5132 bytes
SHA-256: 2405e85d07dc6b1628f561076007895801ebf1434b05e9f493885c65bb0bf9cc
font_01_sfnt_off0000efbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBF 11120 bytes
SHA-256: 622424debccaef647168cf8e0eb126eaf2031f54fcf83d2768b40d923e21dac5
font_02_sfnt_off00011623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11623 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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