Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5574eeea8baeee3…

MALICIOUS

PDF

86.6 KB Created: 2020-11-17 22:39:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: e0b4c508a8d5c358b923681979638b85 SHA-1: 1be34790a99e822f4f46508dbca8f9d213347f87 SHA-256: d5574eeea8baeee36e6fdd506eb776ac567b5119db6fa80d3afe0e4e88c0c8db
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, including one to 'traffnew.ru', suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/123?utm_term=roblox+got+talent+piano+sheet+megalovania PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412391/normal_5f9dc9fb4ab7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371244/normal_5f8a94fbe9682.pdfIn PDF document text
    • https://fezuxikazosulav.weebly.com/uploads/1/3/1/3/131398093/9928535.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375076/normal_5fa1037a0a872.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427284/normal_5fad23fc274d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371812/normal_5f93b13ed79d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371809/normal_5f8eaeeb56e1c.pdfIn PDF document text
    • https://tiposowa.weebly.com/uploads/1/3/1/1/131164246/kozid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365628/normal_5f872e9015eac.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/e3eaae06-881b-4896-91bd-8557527c8387/66011015561.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/kivemukinuzuref.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11864c0c-b5ce-43bc-a72c-ad358a7fc574/disgaea_4_complete_achievement_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/80818428918.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/zowomabafuporarivufelul.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00011de2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11DE2 26920 bytes
SHA-256: c5fe50b7296edc110aa764a8641155669c477089a92880d73b7e2753a42620d9
font_00_sfnt_off0000e56c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56C 5412 bytes
SHA-256: 41917836db4cf94419eba8c5e28f4909e3550fc608c51c43aaab62c745327c71
font_01_sfnt_off0000f7c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C1 11076 bytes
SHA-256: 77fd8c7666fd24447071437e7a57ba1c385143fe2bf495be180e93134989828d

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