Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e21b30a07c3a3bf…

MALICIOUS

PDF

82.1 KB Created: 2021-02-24 04:27:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d39104de4cbc46b292a907b7a1b61a05 SHA-1: cdccad5c282c9dabcdf82b59f57b3352db0e3b4c SHA-256: 1e21b30a07c3a3bf08cd94ebd69ecb4570b041142b1bfe73e09102e406282433
156 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 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 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.
  • 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://maypoin.ru/strik?utm_term=how+to+replace+lg+washing+machine+drain+motor PDF link annotation
    • https://jirogadipew.weebly.com/uploads/1/3/1/6/131606393/zixesabamoxiluviji.pdfIn PDF document text
    • https://toxupuxuforiri.weebly.com/uploads/1/3/5/9/135966975/finosisewazus.pdfIn PDF document text
    • https://cdn.sqhk.co/lexaxemiji/hcDAtgh/birthday_party_decoration_ideas_for_him.pdfIn PDF document text
    • https://rajexomogalifi.weebly.com/uploads/1/3/4/8/134891851/688a5738fedb6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_6031ee9f1e95f.pdfIn PDF document text
    • https://lirupije.weebly.com/uploads/1/3/1/6/131606624/femadipez-musesafi-zemavijorexis-midivikejaluz.pdfIn PDF document text
    • https://cdn.sqhk.co/napumefu/zhbichi/midad.pdfIn PDF document text
    • https://xinomufe.weebly.com/uploads/1/3/4/7/134706409/zegebojuxuredopo.pdfIn PDF document text
    • https://lepamume.weebly.com/uploads/1/3/4/8/134882258/xolerosadoj.pdfIn PDF document text
    • https://xivibexewodexaz.weebly.com/uploads/1/3/1/3/131397964/7213049.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/mamibis/wugigefajadesejekob.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/nakeg.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/haggadah_english.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/zizaxikajevafuweziponobij.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/vanuzepof.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_off0000ee3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3F 5540 bytes
SHA-256: f2964cf738106376e24672b7165351c590c64db2e2d57baba55306af238ce6c2
font_01_sfnt_off000100f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F6 10832 bytes
SHA-256: e24aee2e6d3dcfd9b2d0528a99e7877d7bdff8816c98542ffe7a5e8e77d60bcc
font_02_sfnt_off000125fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125FC 16148 bytes
SHA-256: 333c6b7950143ef5b768b9d621755905cb9f9f437be433e332b6baa8edb2b5fd

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