Malicious PDF — malware analysis report

Static analysis result for SHA-256 b61ec0149b5f5312…

MALICIOUS

PDF

68.8 KB Created: 2020-11-13 15:17:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 173185b54c3245fd6b334c5412b3eb8a SHA-1: 7be28205229a426283a2543a31faaafe0cc3c5d4 SHA-256: b61ec0149b5f53129d180f448cdbdea085df83e98fb697497422bf729fc12dd8
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://traffset.ru/123?utm_term=12+bar+blues+ukulele+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370561/normal_5fa98afcaeaa2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408330/normal_5f9b7f5deb60d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409813/normal_5fa1f7561574d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408462/normal_5fa866b71dccb.pdfIn PDF document text
    • https://vuxarujetununo.weebly.com/uploads/1/3/4/4/134437765/paxifemofejuzifuwola.pdfIn PDF document text
    • https://pimelotug.weebly.com/uploads/1/3/4/5/134576353/pabekosupumera.pdfIn PDF document text
    • https://xataramev.weebly.com/uploads/1/3/4/3/134320843/bedijenutowulixa.pdfIn PDF document text
    • https://xavujome.weebly.com/uploads/1/3/0/7/130739328/favodepoti_lorobepovanid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_5f8eb3d0c1a45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374024/normal_5fa7955b68b84.pdfIn PDF document text
    • https://dedotomonifagax.weebly.com/uploads/1/3/1/6/131606429/2b1fca022bd.pdfIn PDF document text
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/2038155.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/bamudepekepa_setumazowido.pdfIn PDF document text
    • https://fusemikak.weebly.com/uploads/1/3/4/6/134649426/ec2ee.pdfIn PDF document text
    • https://gumopukuzi.weebly.com/uploads/1/3/4/4/134481114/3082528.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/viking_professional_refrigerator_manual.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_off0000d120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD120 5328 bytes
SHA-256: 4caf9860207111eead825be0ad3585a813020dd63f3b600794521ec179963f79
font_01_sfnt_off0000e34f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34F 10356 bytes
SHA-256: 86241d2030f3865021eca431ad6228a3187eb461078134b6782f369046b0d604

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