Malicious PDF — malware analysis report

Static analysis result for SHA-256 25d9969197e04b63…

MALICIOUS

PDF

87.6 KB Created: 2021-03-26 13:10:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f51e5502f1d1deff849297e74afee64d SHA-1: 99cb175d3bdf31da2fbc5a621952ae6b327c7d7c SHA-256: 25d9969197e04b6341e1a499b641a4b0b962075ae94c6c0747bfa19aa9226f7a
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 0.9997

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 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://bologen.ru/wix?keyword=word+whizzle+champion+answers+places+on+the+web PDF link annotation
    • https://sulovuve.weebly.com/uploads/1/3/5/9/135973568/xivibubiwolew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374685/normal_5fce747f61258.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412896/normal_604b42e4d60f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370269/normal_60339ea6c938e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419192/normal_5fcc4e31a33c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457312/normal_5fdb5a165b0ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380707/normal_5fe8ff1844de3.pdfIn PDF document text
    • https://sanijala.weebly.com/uploads/1/3/4/8/134889677/d5c8ad948d3fcd0.pdfIn PDF document text
    • http://zebolalifitu.22web.org/aldehydes_and_ketones_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455370/normal_5ff68bf53b15d.pdfIn PDF document text
    • https://fuwefepitebu.weebly.com/uploads/1/3/4/7/134709748/3881399.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482407/normal_5ffddc4d4915a.pdfIn PDF document text
    • https://zobegutibeg.weebly.com/uploads/1/3/4/9/134902349/fosofiresisebisifeko.pdfIn PDF document text
    • https://bigonokefexix.weebly.com/uploads/1/3/4/5/134518339/ac3ee69c93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407664/normal_6027be2ab67f0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zesubilav.epizy.com/bulgaria_student_visa_application_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5473fa42-1115-4866-a434-e5c8cfa74b2f/nitro_pro_9_free_download_for_windows_7_32_bit_with_crack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c34c00e-74bd-4c6d-9afa-dd6880ddef7e/pathfinder_kingmaker_companion_tank_builds.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66b34abc-b588-4c3f-a5cf-c43586673660/dijidifafitedur.pdfIn PDF document text
    • http://lexafuz.epizy.com/47059963642.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63bd91a6-71fe-4c15-b3f0-b5b2b49ed5c6/how_to_fit_integrated_dishwasher_door_bosch.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000116a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A6 5608 bytes
SHA-256: 366f724ab84392c23e072a4d8c4250f6981d0545b2f50a29aaab0b54b5817d79
font_01_sfnt_off0001299e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1299E 11464 bytes
SHA-256: c74dabf83a78cae6d418a6c9dda06a57122ac92c8b2e8ebaac92ebaa2268d7d5

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