Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dacaabb25a57cb1…

MALICIOUS

PDF

60.9 KB Created: 2021-02-20 09:39:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: daa552408af2541f28ea5f96b399d2cb SHA-1: 03258e361212f2a741bca6acad8834a8cbbacecd SHA-256: 5dacaabb25a57cb12b9dd40f6f5ef83d9c576bc39747d919e4a02d0d5c9bb667
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/aws?utm_term=jensen+vx7020+harness In PDF document text
    • https://cdn-cms.f-static.net/uploads/4426697/normal_601fd67163d6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407795/normal_601a3995856d3.pdfIn PDF document text
    • http://republvinb.fun/airtel_dth_remote_appx5bbo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404292/normal_5ff6d2b6b8767.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374686/normal_600f40b13ac9b.pdfIn PDF document text
    • http://grizhoff.ru/vozagqxkba.pdfIn PDF document text
    • http://tupakewufitid.iblogger.org/biralejoronovikuxonubemu.pdfIn PDF document text
    • https://batozovij.weebly.com/uploads/1/3/1/4/131455337/1715812.pdfIn PDF document text
    • http://xuwajofona.iblogger.org/arrowhead_140.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465149/normal_5ff01ddaa38af.pdfIn PDF document text
    • https://nipefewemaxu.weebly.com/uploads/1/3/4/3/134387654/jinugiwitelixake.pdfIn PDF document text
    • http://centerverifybadge.com/hp_probook_6570b_price_in_indiaj6jsp.pdfIn PDF document text
    • https://wupugosow.weebly.com/uploads/1/3/1/3/131382590/nowitedawonusavaboza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372696/normal_60186cc72b36a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lamekukibudinos.epizy.com/32391851501.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB330 5212 bytes
SHA-256: 59b8fdd2daea2305aacc0b1047683499ecccebf3cd2c9760424ec9a1ddb00084
font_01_sfnt_off0000c4ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4EC 9988 bytes
SHA-256: 8d1fa21dae5a91eac56f059e8c3c77288272beae12e80d83fdd7fb3c9e488d01

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