Malicious PDF — malware analysis report

Static analysis result for SHA-256 da8342cea898d4ed…

MALICIOUS

PDF

70.8 KB Created: 2021-05-27 10:55:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 0f4476cac35c08d83462f611b88d6de3 SHA-1: d1afe81a610fc84226194dc88ca377e1e9aff250 SHA-256: da8342cea898d4edd4e9efe13470448bef82966099cd8fb7bf8445ad6488cbcb
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, with heuristics indicating a large number of external links, suggesting a link farm or phishing attempt. One of the embedded URLs, 'https://ponafet.ru/strik?utm_term=suicide+squad+2016+full+movie+watch+online+dailymotion', appears to be a lure for potentially malicious content. The presence of embedded URLs and the nature of the heuristics suggest an attempt to trick users into visiting malicious sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=suicide+squad+2016+full+movie+watch+online+dailymotion PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4403814/normal_5fcfb074c543a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492246/normal_5fd5f15dcbbed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382619/normal_5fd1748bdb4d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452845/normal_603c54df662ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456666/normal_604d49f37f012.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451039/normal_6000a5dca0dd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374847/normal_605163e2460b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479938/normal_601744ae3395f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459794/normal_6009a5362e893.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426416/normal_5ffb595cd644f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475739/normal_602605c234431.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394071/normal_5ffa06a09d063.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371787/normal_605ba5550ab25.pdfIn PDF document text
    • https://kovibokasekur.weebly.com/uploads/1/3/4/8/134880184/5151540.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462352/normal_606c83c737703.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383806/normal_605c39018a0cc.pdfIn PDF document text
    • https://fifukujujaki.weebly.com/uploads/1/3/2/6/132680890/rakugumalizir.pdfIn PDF document text
    • https://tetikofigutuda.weebly.com/uploads/1/3/4/4/134445118/susawimurevavara.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453747/normal_5fd354b8481c9.pdfIn PDF document text
    • https://sulogaxelope.weebly.com/uploads/1/3/1/4/131438888/7805262.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491945/normal_6013726ae9e60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387040/normal_603a1556a8c8b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466411/normal_6005337c6f66f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446280/normal_5fdebc7550d71.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_off0000d351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD351 6128 bytes
SHA-256: cbc6b35c607c90f95330e11332b7642b173cdc44ed35954ae714c36e7f3301c0
font_01_sfnt_off0000e826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE826 10920 bytes
SHA-256: 4f13e74839d01a86639a540b397e4c2e6c5a8d143f21b08edd8dccb59ec41f3f