Malicious PDF — malware analysis report

Static analysis result for SHA-256 12216e3d23fa5fa1…

MALICIOUS

PDF

83.7 KB Created: 2021-06-07 07:10:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: aaac60cf5e99765d9d158ff11e192b7e SHA-1: ad06fac3b03faac9799a5c379bcc1ce98c9ad7e4 SHA-256: 12216e3d23fa5fa1a434fc06f0c2b04fa6753e35c8c565ce5f1953e7761f1518
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 0.9995

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://synerhu.ru/pbw?utm_term=what+is+narrative+in+film PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427501/normal_600f87a6e4c90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370072/normal_6027f671315b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475203/normal_6039f024b9d0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366327/normal_6059b77df09f0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484631/normal_5fe2ddc6219ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493602/normal_6033e77f47792.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476925/normal_60b87a144c4c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500453/normal_606a0ca12758f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412183/normal_5fc60da977655.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403822/normal_606be857acf57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454819/normal_6068955a91b8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481665/normal_60234a5652d57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410002/normal_606435e2be8b7.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4471235/normal_60b00148d4c51.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/6391c38e-5893-4f1e-8eb4-a4190978e44c/1821835349.pdfIn PDF document text
    • http://kufujibumufa.pbworks.com/f/70122766084.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d94472e0-ddc1-4a84-bf10-c8042d5c1c50/87818017790.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9be2747c-efea-4188-97c3-281581053ca5/52081469601.pdfIn PDF document text
    • http://fulusivijomu.pbworks.com/w/file/fetch/144772179/how_to_use_relion_micro_blood_glucose_meter.pdfIn PDF document text
    • http://sizolasipape.pbworks.com/f/27006328167.pdfIn PDF document text
    • http://fajopab.pbworks.com/f/its_raining_tacos_loud_roblox_song_id.pdfIn PDF document text
    • http://lomubel.pbworks.com/w/file/fetch/144496008/lattice_multiplication_grid_template.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_off0000fe99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE99 4756 bytes
SHA-256: e15924685327d4ae63831a5a3af722ec271c80ff0b8350f3940481358517d3f0
font_01_sfnt_off00010e8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E8E 10720 bytes
SHA-256: 61eee9c62ff8376a751e63a4f1ae0e54a876e375c2562c96b9cbd1df58990451
font_02_sfnt_off0001332a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1332A 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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