Malicious PDF — malware analysis report

Static analysis result for SHA-256 b21adba2a9a2746f…

MALICIOUS

PDF

60.3 KB Created: 2020-11-18 12:24:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 931d314d81d3aa427d8f0f8491bd3a3f SHA-1: bd537ed8c9e6f5e341e356039366e81cee12c2f2 SHA-256: b21adba2a9a2746f7a9ba31d93bc379340181c83a69a3a23484e8829b2e6323b
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one pointing to 'traffnew.ru', suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate maliciousness. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/aws?utm_term=film+booksmart+sub+indo PDF link annotation
    • https://suzokixuvajix.weebly.com/uploads/1/3/0/7/130776208/mekarafurasumi_posubawadokab_bewabes_jufulijoke.pdfIn PDF document text
    • https://vumuzasal.weebly.com/uploads/1/3/4/5/134586685/7734db5f0705cb.pdfIn PDF document text
    • https://suduvigil.weebly.com/uploads/1/3/4/6/134697429/822229bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496360/normal_5faf89e48a3d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413243/normal_5fa0d19766023.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/a3e07ecae.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/tesodagiwor/96165537369.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/likotuxijoximoximoxu.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/83755156461.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/waxikirebadelotigovali.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/60559004438.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/taiwan_high_speed_rail_timetable.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/70766033331.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_off0000aeb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEB4 5132 bytes
SHA-256: aaf8be11f23eb49c9a61e6a1f91f54fa06dd665cd3e7c8394df606ec925273d5
font_01_sfnt_off0000c00b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC00B 10668 bytes
SHA-256: 318a6c969409bb6e99d0c9f8fabe325184f2a339675f93bf52cbf55f463f3dd7

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