Malicious PDF — malware analysis report

Static analysis result for SHA-256 67197f51254afab3…

MALICIOUS

PDF

74.6 KB Created: 2021-06-06 14:42:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 102e36ce121a70731136356cc790966c SHA-1: 16ef2bd8e65252cfeb6878e89e84ab7f49f2cc8f SHA-256: 67197f51254afab30ff7bd9bf090d691bedac89701a781b9246d416ee954ddc0
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 0.9998

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 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=non-binding+indication+of+interest+template PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4467586/normal_5ffa6e7c086c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496582/normal_603f91a3c7f5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375703/normal_604b1f9c391e9.pdfIn PDF document text
    • https://vaxudiku.weebly.com/uploads/1/3/4/7/134709892/407f2f48402b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390999/normal_5feb5ed934c9f.pdfIn PDF document text
    • https://susawodaf.weebly.com/uploads/1/3/2/8/132814942/vapumuwu-tunemewofev-nuzuki-bomikuxo.pdfIn PDF document text
    • https://pusikeruwupij.weebly.com/uploads/1/3/4/5/134518778/rijexuxan.pdfIn PDF document text
    • https://japujavawewiri.weebly.com/uploads/1/3/2/6/132696154/4466458.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/2391a535-f321-456f-88d1-5515000e558a/nisixamu.pdfIn PDF document text
    • http://junerew.pbworks.com/f/how_to_read_washburn_guitar_serial_numbers.pdfIn PDF document text
    • http://wefolevemud.pbworks.com/f/1694146583.pdfIn PDF document text
    • http://zowonixepor.pbworks.com/f/how_to_install_patch_pes_2020_mobile.pdfIn PDF document text
    • http://nimogomaw.pbworks.com/f/47739845885.pdfIn PDF document text
    • http://zezupagijene.pbworks.com/w/file/fetch/144602655/7271302832.pdfIn PDF document text
    • http://natutaliva.pbworks.com/f/65911544763.pdfIn PDF document text
    • http://bevojoluvu.pbworks.com/w/file/fetch/144464028/how_much_does_it_cost_to_renew_car_registration_in_abu_dhabi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9886f16-2c66-4011-b4c5-dc3819b8d85e/are_the_fantastic_beast_movies_prequels_to_harry_potter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/751f2a38-f32f-439b-b5bb-9d38d8c90fb4/30068056391.pdfIn PDF document text
    • http://jajisaparev.pbworks.com/w/file/fetch/144611763/bukitaxetolororesewe.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_off0000d829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD829 5404 bytes
SHA-256: 3a3c5aa24998111c5258091b46ca2e05ac87d27ae2481ce6b9ef78c660bacd71
font_01_sfnt_off0000ea74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA74 10568 bytes
SHA-256: a83bc87252f15b179283df4290909776904a3ffd243f2776fdcc460992676075
font_02_sfnt_off00010eb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB5 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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