Malicious PDF — malware analysis report

Static analysis result for SHA-256 b09027877b69e359…

MALICIOUS

PDF

71.1 KB Created: 2020-11-10 01:07:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3c49a2d92bf64cc2469ab4128df52498 SHA-1: de4ff501731ca7812261a24a0e58c9a40567aa36 SHA-256: b09027877b69e3592ace57b28be4113ccc9872b35938575eee1f3189fc8746cb
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 0.9997

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 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://traffine.ru/123?keyword=nikon+n6006+user+manual PDF link annotation
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/lozosukesul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393624/normal_5f9db698e384c.pdfIn PDF document text
    • https://pedegafulip.weebly.com/uploads/1/3/0/9/130969407/sibapobe-zesewozu-wedov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388040/normal_5f9ec89f3963f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368481/normal_5f94d1a474f49.pdfIn PDF document text
    • https://lefiletigej.weebly.com/uploads/1/3/4/5/134597596/9753669.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369651/normal_5fa205834ddc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461786/normal_5fa2bfd10bb92.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/71bf438f-c306-4e39-893c-382752d4810f/season_20_south_park.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/marobijezavawegokoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0aa778fa-f92b-49ad-a35c-67fe28d3cb28/clash_of_clans_hile_apk_day_viyaza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5d21b8d-ec1a-4065-91d1-4ef62ff470c4/easiest_wizard_set_dungeon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e04801db-4cc7-4165-a53e-23508eb434c6/47209794593.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cda7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA7 4964 bytes
SHA-256: 824306d62262cc45b678d3142583f6c66245afbdf6af3cf6a7c16b3f5c6e777b
font_01_sfnt_off0000de5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE5D 10296 bytes
SHA-256: a9ac9fa2d54eb3d61bddd5a1f4b6c05d7546649a44c9e8f701759bbcd6cc2ad7
font_02_sfnt_off00010173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10173 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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