Malicious PDF — malware analysis report

Static analysis result for SHA-256 00da2b20a8ef6390…

MALICIOUS

PDF

110.7 KB Created: 2020-12-27 18:28:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: fa8389c7d257cde2f55b292828ee48f7 SHA-1: c4d92785155826a9a44099a83ac28eaa84db27ff SHA-256: 00da2b20a8ef639092cf9f36955e261c30fcdbd050e55ff7b07572821eb5b538
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/123?utm_term=poemas+de+jos%25C3%25A9+%25C3%25A1ngel+buesa+pdf+descargar+gratis PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374838/normal_5f920cea58ded.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382779/normal_5f9c82147ebce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405922/normal_5fd8701d23036.pdfIn PDF document text
    • https://xoverepidagagit.weebly.com/uploads/1/3/4/4/134469055/f6a196.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426409/normal_5f9bce8ed6286.pdfIn PDF document text
    • https://cdn.sqhk.co/tikalijit/3ggCUgi/seesaw_icon_png.pdfIn PDF document text
    • https://cdn.sqhk.co/risevejuxik/Lybiigj/42040403869.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460228/normal_5fc04db57faf1.pdfIn PDF document text
    • https://cdn.sqhk.co/lafugafeniki/Kihoijg/pokemon_tv_show_release_date.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411932/normal_5f95322ac0cee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368488/normal_5f89343768ffd.pdfIn PDF document text
    • https://cdn.sqhk.co/bujavenizake/geAc2ji/kugilamakofujetijeduvetin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451955/normal_5fae947581b08.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16438 5948 bytes
SHA-256: 11cb946ab1a59ed243e5a0ebf39a3a16d40c69e75dbeb226512097e59da87b8b
font_01_sfnt_off0001777c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1777C 11444 bytes
SHA-256: a27bc4174fcf8155c83552999fff79ee9599085422e9ecd3a20fadd6323ea0ab
font_02_sfnt_off00019cc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19CC1 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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