Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c8e47df4113f631…

MALICIOUS

PDF

65.6 KB Created: 2021-02-23 11:29:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 7578b5b718de1e007bc798a704225bf5 SHA-1: 3103a4f23e433286f8479dd72b567a1ec88712ff SHA-256: 0c8e47df4113f631fdd77d7a8b8015a4dcb2f383c24b5dbf3f673cd0503d79f6
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://jacksth.ru/wix?keyword=milescraft+router+circle+guide PDF link annotation
    • https://mosevulex.weebly.com/uploads/1/3/4/8/134860143/9207781.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444098/normal_601484dbeec09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418180/normal_600bfc032e641.pdfIn PDF document text
    • http://7lessons.fun/environmental_management_system_template_small_business49umq.pdfIn PDF document text
    • http://eagleaff.com/waiver_and_assumption_of_risk_template14ilz.pdfIn PDF document text
    • https://tediresul.weebly.com/uploads/1/3/5/3/135345321/7410197.pdfIn PDF document text
    • https://pudabesipewoz.weebly.com/uploads/1/3/0/9/130969441/1632277.pdfIn PDF document text
    • http://kikudesazogug.22web.org/use_bacterial_transformation_in_a_sentence.pdfIn PDF document text
    • https://rajevolid.weebly.com/uploads/1/3/0/8/130813967/jozuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480173/normal_600fb195e8fd9.pdfIn PDF document text
    • https://tejikapor.weebly.com/uploads/1/3/1/3/131382395/2560159.pdfIn PDF document text
    • http://vash-komfort5.ru/tinkers_construct_auto_repairlcswt.pdfIn PDF document text
    • http://segwaywheelchair.ru/53584758396fr9db.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415322/normal_5fe3571f4b6e8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC373 5196 bytes
SHA-256: 65f75e310c7a58b1836dd98b267128fcad28d8b8d91bb3011112627893cb0c6e
font_01_sfnt_off0000d53a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD53A 10732 bytes
SHA-256: bc96ce6def13da421cb6a71f6b83953ea8409d9681485c1727f1552d87f2c112