Malicious PDF — malware analysis report

Static analysis result for SHA-256 87a2789bf65856b6…

MALICIOUS

PDF

72.6 KB Created: 2020-11-13 16:03:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f543a4ca86d8f0ff285218587406712 SHA-1: d0c7592be9fc5e76971a808a75a5a0cf668e5942 SHA-256: 87a2789bf65856b61d273529372c4f4a974731190dab2d4e55d5628e45331fd7
162 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a malicious redirector and a phishing lure, specifically referencing an invoice. The embedded URL `https://traffmen.ru/aws?utm_term=broadsheet+brisbane+lunch` is flagged as malicious and likely serves as the initial stage of a phishing attack. No scripts were extracted, but the PDF structure and malicious link strongly suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://traffmen.ru/aws?utm_term=broadsheet+brisbane+lunch
    • https://cdn-cms.f-static.net/uploads/4374838/normal_5f8a1bc6033e2.pdf
    • https://cdn-cms.f-static.net/uploads/4409255/normal_5f95b0fd7f7d4.pdf
    • https://cdn-cms.f-static.net/uploads/4368494/normal_5f952bc9825c0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/viboxikuz/invoice_email_template.pdf
    • https://s3.amazonaws.com/wipotegadodorek/alimentacion_y_nutricion_del_adulto_mayor.pdf
    • https://s3.amazonaws.com/sisaxu/bullworker_chart.pdf
    • https://s3.amazonaws.com/figugipopar/quadratic_review_worksheet.pdf
    • https://s3.amazonaws.com/xanebavifamopez/14761474888.pdf
    • https://uploads.strikinglycdn.com/files/e4ddc8e9-25d4-44b8-ba7a-b1c954957882/70334245732.pdf
    • https://s3.amazonaws.com/mutirexa/87035983776.pdf
    • https://uploads.strikinglycdn.com/files/974358f5-c00a-4e4c-9ab8-dc9b9f314441/89548650557.pdf
    • https://s3.amazonaws.com/jumedemimo/expanded_metal_mesh_sheets.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dead.bin
27b52cda888ba1987454bacdc313dd0143977d38d51272ba17ebc8414959a6af
pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAD 5216 bytes
font_01_sfnt_off0000f063.bin
f99b6337dcaf4705880e92c3545a024161f03c4a44f714e6f17d8562ce5b2c3a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF063 11152 bytes