Malicious PDF — malware analysis report

Static analysis result for SHA-256 7990b270aa588073…

MALICIOUS

PDF

75.4 KB Created: 2020-11-20 18:19:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: d0f24a9acb9261591a5816e42849b393 SHA-1: 25f0281408425c697aebddcc22d12cea76da1da4 SHA-256: 7990b270aa588073056ee873930edf4af4e2bbc18c4d4a4c5b257b2e08a41950
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://traffset.ru/123?utm_term=101+dalmatians+series PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375700/normal_5f8d5f1e0271d.pdfIn PDF document text
    • https://pejilajapife.weebly.com/uploads/1/3/4/4/134477767/c925a85bb7.pdfIn PDF document text
    • https://firerokuk.weebly.com/uploads/1/3/1/1/131164187/jiwitet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452594/normal_5fa44f8cb0f4e.pdfIn PDF document text
    • https://bodupojuribun.weebly.com/uploads/1/3/4/7/134758420/706d07c3dc47.pdfIn PDF document text
    • https://xisubuto.weebly.com/uploads/1/3/1/3/131380177/kukebidiz-jukap-dojemawagalesi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456134/normal_5fb79626d5eb6.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/5a0a0e9b-4ab3-4f5d-ad59-ecf9e1e64d66/faxipus.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/final_fantasy_guide_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5444e9a7-6ca8-4630-8b07-6ecc411e1aba/99150175394.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/luvukavudikuvu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d188a4f5-5a2b-4e30-b637-6ef09bb92d93/be_vakit_ezan_sesi_mp3_indir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4cdc5f6-7c73-407d-bdee-790f551412d5/one_hundred_love_sonnets_pablo_neruda_analysis.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB8 5068 bytes
SHA-256: 4c69138da11e103c2128b58e3914a74ac3bc3828c5412876b3f691f697c2c44d
font_01_sfnt_off0000fcdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDC 10880 bytes
SHA-256: 445053f7fa23c43bb05c72101aaa0be142521b347dd2094597b2d592e95c192f

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