Malicious PDF — malware analysis report

Static analysis result for SHA-256 f19ced00b3add0c3…

MALICIOUS

PDF

66.0 KB Created: 2021-01-09 23:40:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 6ff878f26c2fcd859096e2634f655a2b SHA-1: 94378aea2c17f5a9393a5bf0327b65c868ab34d7 SHA-256: f19ced00b3add0c3a99a148b4cbd6cd0310ff34822f2bd87ccf3ba65e9a1ca40
214 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, including a known malicious redirector at 'traffmen.ru'. It also exhibits characteristics of a PDF link farm, with many links pointing to other PDFs, suggesting a campaign to distribute malware or conduct phishing. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffmen.ru/aws?utm_term=brastemp+ative+11kg+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413867/normal_5fbefd291b8e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393361/normal_5fa9dddd5e07d.pdfIn PDF document text
    • https://cdn.sqhk.co/vopufepivipe/nPjhpje/50345664705.pdfIn PDF document text
    • https://cdn.sqhk.co/monasomeb/gejeu2y/87854563410.pdfIn PDF document text
    • https://volokosebu.weebly.com/uploads/1/3/4/8/134871595/jivezefivom.pdfIn PDF document text
    • https://gatilesajegume.weebly.com/uploads/1/3/1/0/131070678/518837.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418369/normal_5fcc61e14b12f.pdfIn PDF document text
    • https://site-1178182.mozfiles.com/files/1178182/snes_online_controller_release_date.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423166/normal_5fcc5312eabb0.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/napisakaluja/nokixiwogotevodovod.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/kifodigosagefowagavebawu.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/somovupazukezuxati.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/pokemon_black_and_white_coolrom.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_off0000bf18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF18 5364 bytes
SHA-256: 2007af4b70a7ecf61120572cdd1650c1a63a8ca5cac344f7e5464806f5213280
font_01_sfnt_off0000d153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD153 13148 bytes
SHA-256: 2ba98d49b93b098721531f1497f6f4fbbcb4b8fab02dd31d8bb3bf20595c2e48

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