Malicious PDF — malware analysis report

Static analysis result for SHA-256 22baa0f34c593062…

MALICIOUS

PDF

68.0 KB Created: 2020-11-25 23:09:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c6102f28412452246bb7c9c995f93ba0 SHA-1: 76bc33ed71a58ded1d26bc6a081ddcb39c02881f SHA-256: 22baa0f34c593062126dccb00e99cacc151d041bfdbb656f05bb087090b47899
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'https://cctraff.ru/strik'. The document body, though heavily obfuscated, contains text that appears to be a lure for a manual. The presence of numerous external PDF links, including one to 'https://cdn-cms.f-static.net/uploads/4369772/normal_5fb835457fc21.pdf', further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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
  • 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.
  • 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.
  • 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/strik?utm_term=asus+crosshair+v+formula-z+manual+espa%25C3%25B1ol In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369772/normal_5fb835457fc21.pdfIn PDF document text
    • https://velolabojenap.weebly.com/uploads/1/3/4/5/134525374/d107a94ef4f6f22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382003/normal_5f8d61f3e9695.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/mubefula/coleman_mach_air_conditioner_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/calendario_septiembre_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/love_is_a_losing_game_lyrics_traducida.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/listeria_meningitis_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/sebom.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_off0000c960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC960 5596 bytes
SHA-256: 4d7001abf8a1e60bb458255dbe1005cbc2009ae7bc720a03ae63adae0bbb1c76
font_01_sfnt_off0000dc1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1A 11140 bytes
SHA-256: d2d21f43bbcede1dc0f0dbf273b67ff356644045b757694d0b9144c78f14ba01

Open this report in the interactive analyzer, or submit your own file for analysis.