Malicious PDF — malware analysis report

Static analysis result for SHA-256 651bf170a90896fd…

MALICIOUS

PDF

75.2 KB Created: 2020-11-14 10:03:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7c8982e0b51cb71733a2a14cadcb42d6 SHA-1: eff322f4e00f23bdbea01acd015ddda0b5c5268f SHA-256: 651bf170a90896fd9450c69663601dc9c016f44ab1a4e793613083c94251f8ef
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, a common tactic for link farming and SEO manipulation, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. One of the primary URLs, 'https://trafffe.ru/aws?utm_term=free+joomla+templates+for+it+company+website', is flagged as suspicious. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

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://trafffe.ru/aws?utm_term=free+joomla+templates+for+it+company+website PDF link annotation
    • https://moguvikob.weebly.com/uploads/1/3/0/8/130874292/mawafukutopopomu.pdfIn PDF document text
    • https://tebefatudu.weebly.com/uploads/1/3/4/3/134329870/9082122.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379852/normal_5f8af42c785c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424951/normal_5f9b685c551dc.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/bededuxotulapil/merge_intervals_problem.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/commercial_oral_exam_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/winnipeg_free_press_obituaries_archives.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/old_time_religion_song_with_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/pebuf.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/cow_heart_dissection_lab_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/pukasojalu/spanish_definite_articles_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/86300195048.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_off0000ea64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA64 5528 bytes
SHA-256: 0ac4a32ab07e6f347ceeb695a14b04936ed051e15f0fc6c678ca7bc6c10f0fd6
font_01_sfnt_off0000fd33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD33 10144 bytes
SHA-256: 3f09d4b5c2dc6e3e4836f0503eb3844b0f507a390825847e82d1e5940a401fe6

Open this report in the interactive analyzer, or submit your own file for analysis.