Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb05635247710c47…

MALICIOUS

PDF

61.1 KB Created: 2020-11-18 01:28:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29b1756f4fb7f2f0b241b59f22f89961 SHA-1: 42a29a5f2e4f78ab7a8cd91dd5183987107faea2 SHA-256: eb05635247710c47134c2e6f7ffc0fdec287cbdeb454e1fde1ef9d7822e42a57
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The embedded URL points to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. No scripts were extracted, but the presence of a malicious link is sufficient evidence of a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ggtraff.ru/123?utm_term=comprehensive+pharmacy+review
    • https://cdn-cms.f-static.net/uploads/4420767/normal_5f9d0a621cd7e.pdf
    • https://cdn-cms.f-static.net/uploads/4379385/normal_5f8df11080ab7.pdf
    • https://cdn-cms.f-static.net/uploads/4379616/normal_5f943dd109314.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bitajemisajoz/29424358617.pdf
    • https://s3.amazonaws.com/mizeteb/discovering_ancient_greece_crossword_puzzle_answer_key.pdf
    • https://uploads.strikinglycdn.com/files/be4fbf5c-4214-4176-bf87-e2c654d82a6e/64968775686.pdf
    • https://uploads.strikinglycdn.com/files/a23d5c0c-b302-4362-bfae-2a66e83c01e1/think_and_grow_rich.pdf
    • https://uploads.strikinglycdn.com/files/7a75f3f7-c380-4dfa-b310-41d1db572341/89908681927.pdf
    • https://s3.amazonaws.com/nerugiraxura/ruxono.pdf
    • https://s3.amazonaws.com/zirojopemup/acervo_cultural.pdf
    • https://s3.amazonaws.com/desenaz/naruto_vs_bleach_unblocked_76.pdf
    • https://s3.amazonaws.com/gixawetopoli/classifying_real_numbers_worksheet_key.pdf
    • https://uploads.strikinglycdn.com/files/13342c7e-b5ff-4234-a68f-f142d2d79cce/livoduxoz.pdf
    • https://s3.amazonaws.com/gorajikunobixi/odd_thomas.pdf
    • https://s3.amazonaws.com/jaxesabi/mundwerk_die_kieferorthopaeden_berlin.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_off0000b4c2.bin
0b8d9b313d61fb1cf3b09e59177d3dada82b1e4250de3ee11f14d3daaa7af0f8
pdf-font-stream PDF embedded font (sfnt) at offset 0xB4C2 5300 bytes
font_01_sfnt_off0000c6b1.bin
6e56a8f9eaa4f6b8618b0bab7a7f3d75c82a0df182fe1148d5adc41ff3fc8021
pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B1 9732 bytes