Malicious PDF — malware analysis report

Static analysis result for SHA-256 265945aa4bf4ec70…

MALICIOUS

PDF

58.2 KB Created: 2020-11-20 02:43:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1f53c7d7a834099e1c7ecf9cdef848ee SHA-1: 7f61f1a4432c7771609d8ef5f2907078b31434c4 SHA-256: 265945aa4bf4ec70556e5a4e432a24f476ee1f1ac16d9fc0aa3845055f6cab28
214 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'T shirt template vector blue'. The presence of multiple external PDF links and a critical ClamAV detection for 'Pdf.Phishing.Trojan' strongly indicates a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://traffking.ru/aws?utm_term=t+shirt+template+vector+blue In PDF document text
    • https://cdn-cms.f-static.net/uploads/4405206/normal_5fadcb35775c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386834/normal_5f9567a5c6c13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375194/normal_5f94e9dc3fd31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425738/normal_5fb43eb7da52c.pdfIn PDF document text
    • https://wogijelagorezu.weebly.com/uploads/1/3/4/0/134096035/3977974.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388406/normal_5fa314e6f1f36.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/luresimosip/48458657720.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/80969145580.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/wezubolegujafuxunek.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_off0000aa44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA44 5324 bytes
SHA-256: a2ef6e9279c2b27578fbcdf06542200a739814def899f007357cfd7e72ffe793
font_01_sfnt_off0000bc32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC32 9552 bytes
SHA-256: f704ca11e0c9033aef8042078303f404ddeac07b4f7cf04999e7723166178e8a

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