Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b229102dbc15ce4…

MALICIOUS

PDF

80.9 KB Created: 2020-12-27 15:15:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 255372acda52f8376c992e74eaf0f384 SHA-1: 59c8d76b1965fda55aca8f14a8846ab835ebdf83 SHA-256: 0b229102dbc15ce4ef0d8345e786f320d861238fe1b5cdedd7c5665a927d16f3
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are hosted on S3 buckets and Weebly, suggesting a link farm or redirection mechanism. The primary URL, trafffe.ru, is suspicious and likely leads to a phishing or malware distribution site. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

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/strik?utm_term=apa+itu+ezypay+plus+maybank PDF link annotation
    • https://pagopejej.weebly.com/uploads/1/3/5/3/135315805/f560731717.pdfIn PDF document text
    • https://lukozosa.weebly.com/uploads/1/3/4/4/134485969/gefitutotiwufa-zoxus.pdfIn PDF document text
    • https://cdn.sqhk.co/miviluwulux/Osvjabk/puxarulojujupaguwez.pdfIn PDF document text
    • https://cdn.sqhk.co/dakagugi/PNlhfhe/jetaudio_hd_music_player_plus_for_windows_10.pdfIn PDF document text
    • https://cdn.sqhk.co/guledijuxi/ihijjcu/24618666552.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/napoledunadigo/nofutetimejuvivunabugod.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/57930141525.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/java_calendar_date_time_format.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/43444467671.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/angle_bisector_worksheet_grade_7.pdfIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/ambitions_japan_tour_dvd.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_off0000fcc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC6 5212 bytes
SHA-256: 26b02f7474b7f9eaa97c5faa873d3fe2eeed30b9ab440694557a0bb01fb76418
font_01_sfnt_off00010e87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E87 11896 bytes
SHA-256: 7a6795a7451f2075e85d037eb535540bdebca552f3d77e1cb0da2ce30247a4a7

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