Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7d61df61052907e…

MALICIOUS

PDF

76.9 KB Created: 2021-05-27 20:48:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: fe3f8b1077d6b236a741e47399bdc224 SHA-1: 55de12ed5f75e228fc96dd8ede2da9daaec0c610 SHA-256: a7d61df61052907e9ae036cae0dd9352573cf57944cbc30f7b34f0416e2234d5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, suggesting a link farm or phishing campaign. The primary URL, 'https://vilenefex.ru/strik?utm_term=nintendo+switch+sell+price+gamestop', is likely used to redirect users to a malicious site under the guise of search results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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.
  • 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://vilenefex.ru/strik?utm_term=nintendo+switch+sell+price+gamestop PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4417834/normal_5ff660cae296c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477921/normal_60418d18763a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414488/normal_605c0fb3d82b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451039/normal_6061ad2a3fad9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418566/normal_60504613e37ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447267/normal_5fd199d82db4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497372/normal_602105d548a3b.pdfIn PDF document text
    • https://rifijilaguselud.weebly.com/uploads/1/3/4/8/134846829/letexuwuzaxazo.pdfIn PDF document text
    • https://saronikevuvu.weebly.com/uploads/1/3/4/4/134460573/2924061.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418746/normal_603416ce1ec2f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469353/normal_5fdcca8311583.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377371/normal_5fde3b2489bd5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501991/normal_5ffa6131f30b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408875/normal_5ff862bf12cce.pdfIn PDF document text
    • https://tuvepovuno.weebly.com/uploads/1/3/3/9/133997374/8771830.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367617/normal_5ff9750526764.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378157/normal_5fd6241c29b22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412591/normal_6010f82ccdb13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472484/normal_5fd1b4825c105.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467573/normal_6015be18e83d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374951/normal_6063e198b0238.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/45738d09-2a4a-4d63-b675-0167a974fe07/bevul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ae6ca31-b975-43b2-8b9e-d81064256f40/volowi.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_off0000ed8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8D 5548 bytes
SHA-256: c0463629b2057e3451229b0452c559770d672b60b4ee2f8e1c4c212cf575ed3b
font_01_sfnt_off00010057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10057 10492 bytes
SHA-256: b0a03159c3be8cefdeb90a2ad5c201d0344d56880f5f0f6b1902121bad6bbd5b

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