Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5d3dc0fe3b985e7…

MALICIOUS

PDF

65.1 KB Created: 2021-01-24 13:42:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c3ca0d072cf64608eeb3977f2908f57d SHA-1: 3be64d999f849b8f28b6f7be7b1062a18736c5e1 SHA-256: d5d3dc0fe3b985e715a081ba6ad9177c08e440403f32cb8839854836532eb83f
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, and is flagged by ClamAV as a phishing trojan. The embedded URLs suggest an attempt to redirect users to malicious content or phishing sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/wb?keyword=head%20soccer%202%20online%20game PDF link annotation
    • https://cdn.sqhk.co/nebafaveju/Fhdgcjj/crazy_driver_taxi_duty_3d_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497695/normal_5fe905dbdfccd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366305/normal_5fdaaba913dd5.pdfIn PDF document text
    • https://cdn.sqhk.co/motixekotet/midlekH/vertigo_medication_cvs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459777/normal_5fdab014b8d1e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379602/normal_5fff4a6896d0b.pdfIn PDF document text
    • https://cdn.sqhk.co/lasesekov/ihegfii/67867653262.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419194/normal_5ff9633c7279f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452865/normal_6009d677e0ae1.pdfIn PDF document text
    • https://tivuwamivubi.weebly.com/uploads/1/3/5/3/135384825/zamokanesegar-tifefozasuligoj-mulul-bezuzapobotuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366980/normal_5fe8d21e41258.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416321/normal_6000a7012e1a0.pdfIn PDF document text
    • https://cdn.sqhk.co/webepinovet/2VK88jd/vuzojumawisigub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417313/normal_600d12743b819.pdfIn PDF document text
    • https://cdn.sqhk.co/mekekomubun/ijMpjc8/retro_furniture_warehouse_glasgow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375700/normal_6005626549d46.pdfIn PDF document text
    • https://takojetomegupaj.weebly.com/uploads/1/3/1/3/131382497/c5a4244378.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421787/normal_5fc9eb645dcbf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369923/normal_5fc6f71f32ddb.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_off0000c3ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3BA 5352 bytes
SHA-256: 043f374e74e30a93d7f1b37e05b6e7ae222d1bd144c89c2dd2aa456080c1e965
font_01_sfnt_off0000d5d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D3 9776 bytes
SHA-256: 9d8418e5a2644e461d8ab154625bb74428aeb83f960a7e233887a5f14652dc58

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