Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2addf35931316f4…

MALICIOUS

PDF

73.0 KB Created: 2021-01-14 22:53:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 31a955f66ac90a44c6526b932ad41379 SHA-1: cc0c97bcef93352b4d2b7ef332b48b095b4900c3 SHA-256: f2addf35931316f43dbcebed451d5a3d8a555562dc7719bef70b9ca4bc5d7c70
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with the primary suspicious URL being trafffe.ru. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and link farm indicate an attempt to redirect the user to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/123?utm_term=provocative+readings+for+socratic+seminar PDF link annotation
    • https://gixakipero.weebly.com/uploads/1/3/1/4/131412713/2944772.pdfIn PDF document text
    • https://suvewuvasalu.weebly.com/uploads/1/3/4/7/134762181/7b303c3fe31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374710/normal_5f926bf213d52.pdfIn PDF document text
    • https://sokuvefababadax.weebly.com/uploads/1/3/1/8/131856373/7696488.pdfIn PDF document text
    • https://wemibevufiwoseb.weebly.com/uploads/1/3/0/8/130813314/2a2e4b6ae9e4ad6.pdfIn PDF document text
    • https://site-1178836.mozfiles.com/files/1178836/block_fortress_war_cheat_codes.pdfIn PDF document text
    • https://regujimupakuve.weebly.com/uploads/1/3/5/3/135348903/7431740.pdfIn PDF document text
    • https://bavifogo.weebly.com/uploads/1/3/4/5/134524367/9211058.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/lixuzo/bluestacks_version_1._0.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/sounds_of_isha_brahmananda_swarupa.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/nojewugedegelizojokob.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/borawebu.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/83650332513.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_off0000e235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE235 5368 bytes
SHA-256: a645ddc19da156a8dcc532549186b44e9ec2dd8efbb7db157faab0136b3a6bf0
font_01_sfnt_off0000f471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF471 10048 bytes
SHA-256: 089eb111ba88dc6a5555e3ccff48f715e421bc369765c24f9fef48d67f36fd39

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