Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d8004a2a40b5200…

MALICIOUS

PDF

67.5 KB Created: 2020-12-27 10:58:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 4bb183eed8b2952c378912eb4368a5a0 SHA-1: 62b175b257699bf162a0175aa39796c4a428e38a SHA-256: 0d8004a2a40b5200ed28f78f4f7f73972d56877c78a7e10f3f4dd390660102e9
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or redirection scheme. One critical heuristic identified a link to known malicious redirector infrastructure at 'traffking.ru'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=pirates+of+the+caribbean+on+stranger+tides+trailer In PDF document text
    • https://cdn-cms.f-static.net/uploads/4414174/normal_5f9cdf19cc5d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5fa09d15d21cc.pdfIn PDF document text
    • https://biparobotimipus.weebly.com/uploads/1/3/4/4/134498468/wovodelategu_dugojiwelov_lavin_jeniwu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475571/normal_5fc2fe62812a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484624/normal_5fc1ffc8c3a2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391611/normal_5fb5dd239295b.pdfIn PDF document text
    • https://ketatesi.weebly.com/uploads/1/3/4/2/134234598/9910048.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481990/normal_5faa511231018.pdfIn PDF document text
    • https://zufugorutamivas.weebly.com/uploads/1/3/4/4/134401118/vogelasedul.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/bejideba/kaxejilururuwewiwuwum.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/diamond_plate_steel_sheets_lowes.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/approval_sheet_dlsu.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/11579825347.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64777373-95c8-4471-ad86-2d94aa64280e/31036402564.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c33cc791-a419-4e9c-9988-e561aaf27099/28463612409.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_off0000c69e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC69E 5424 bytes
SHA-256: 5bbfbbf48fda693aab1a7f0e8a1df97f49eed7775ccfd7919dc9cf40c14fccf4
font_01_sfnt_off0000d909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD909 11556 bytes
SHA-256: 5571ffe9e5ce1f2399f17c1ca2cff6dfffed0e21089d09d1517478b60efbf5e6

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