Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e4496271e0199fd…

MALICIOUS

PDF

77.4 KB Created: 2021-01-13 14:38:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 77c750b6db25db3951cd01be26d316b7 SHA-1: 24c9a40e616cd1d001d941381978a4fde0128dda SHA-256: 0e4496271e0199fd42f5f54606798b5b373ac8eb9909f74caf150faecb721aa8
154 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a critical alert for a malicious redirector link. The embedded URL points to a known malicious domain, suggesting an attempt to lure the user to a phishing or malware-hosting site. The ML classifier also strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://cctraff.ru/aws?utm_term=sda+hymnal++ppt In PDF document text
    • https://site-1173763.mozfiles.com/files/1173763/2795730608.pdfIn PDF document text
    • https://site-1177392.mozfiles.com/files/1177392/jump_jump_a_dungeon_adventure_for_the_king.pdfIn PDF document text
    • https://cdn.sqhk.co/badaxiloru/7iee4gf/19757241138.pdfIn PDF document text
    • https://cdn.sqhk.co/towafeniruje/jggjPij/vipomidanunuxuwesig.pdfIn PDF document text
    • https://cdn.sqhk.co/zelumevimitu/ijiaKnC/tipster_for_toca_kitchen_2_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472204/normal_5ff79329a4015.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387921/normal_5f94b742216d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421478/normal_5fd0d3e8a2ee3.pdfIn PDF document text
    • https://site-1178171.mozfiles.com/files/1178171/nail_salon_open_late_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485569/normal_5fa8494c44a16.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/mufukep/arcsight_esm_6._9_installation_guide.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_off0000e66f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66F 5128 bytes
SHA-256: 03037a6e5e40cb79e25e436f0b37ebf39af0527d3f4bfb669c385d9b843f9a34
font_01_sfnt_off0000f7c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C7 16588 bytes
SHA-256: 1173152732464ed65a50afa64b1b55583c400264481ad92f3359aa9efcbf4fb4