Malicious PDF — malware analysis report

Static analysis result for SHA-256 46de6431106de20f…

MALICIOUS

PDF

67.1 KB Created: 2020-12-19 12:32:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9010fd07ad5dfb75f18fff24c642851 SHA-1: 3fd990aaed16d36517ef8100e1a9b25bb8f2db36 SHA-256: 46de6431106de20fc64178a54944d33d2d8209f8cf90abcd826bf94fcaebc897
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The embedded content, though heavily obfuscated, suggests an attempt to disguise the malicious nature of the document. The primary IOC is the malicious URL used for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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
  • 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=spoken+english+course+contents+pdf
    • https://cdn-cms.f-static.net/uploads/4450251/normal_5fa1b13980f8d.pdf
    • https://cdn-cms.f-static.net/uploads/4454543/normal_5fdaef7debcdb.pdf
    • https://static.s123-cdn-static.com/uploads/4366666/normal_5fc76f9e95774.pdf
    • https://cdn-cms.f-static.net/uploads/4372382/normal_5fa0b0df9a161.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/51ae7571-929f-441d-990e-a57f7c5c9708/totakugufeve.pdf
    • https://static1.squarespace.com/static/5fc790969849b27a00a72557/t/5fc8ab8fe21c7c679ae9434c/1606986639855/nawiwovemumixoxudaxape.pdf
    • https://static1.squarespace.com/static/5fdd5508eb685147a09c9c9e/t/5fddae50c18bd5077c8f0a91/1608363600671/44890222862.pdf
    • https://static1.squarespace.com/static/5fc1d9757848ba205d1f35f1/t/5fc590065147b14804f1617c/1606782982646/2155207016.pdf
    • https://uploads.strikinglycdn.com/files/6e2d4b13-c193-4533-8ce1-d968e87e7b13/vatiriri.pdf
    • https://uploads.strikinglycdn.com/files/93a50068-7969-4f9c-a412-4826a2caa8ce/bawaxenuku.pdf
    • https://uploads.strikinglycdn.com/files/62cde897-e6b7-4f50-bb0b-f362b4835f1b/maxforce_ant_bait_gel.pdf
    • https://uploads.strikinglycdn.com/files/f51fab64-8ce2-4a04-87d1-8b6f83c0543a/42203884820.pdf
    • https://uploads.strikinglycdn.com/files/9cab482b-b534-4315-99ce-1300ce7ae3d6/healing_kit_pathfinder.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_off0000c8b3.bin
713f233cceb0c090b098a09962c7d8bcd8d314fc03a445d595625ee18dfc5271
pdf-font-stream PDF embedded font (sfnt) at offset 0xC8B3 5376 bytes
font_01_sfnt_off0000dafe.bin
cdd0b7d8984fa3be7e1b9de76d2f241890de5008f8942e3ea81459fbb791e3ef
pdf-font-stream PDF embedded font (sfnt) at offset 0xDAFE 11040 bytes