Malicious PDF — malware analysis report

Static analysis result for SHA-256 204fdc3f15eb4765…

MALICIOUS

PDF

69.6 KB Created: 2020-12-19 12:28:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8959877679fe83516b13b60f67e6df1d SHA-1: d94842fc008caa1b9b1e5e477810f853a0887a10 SHA-256: 204fdc3f15eb4765112e468204120adcd072553f090c967a98e9fcd96cb96abf
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with at least one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a strong intent to direct users to potentially harmful sites. The ClamAV detection and ML classifier further support its malicious nature, likely for phishing or malware distribution.

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
  • 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://gettraff.ru/123?utm_term=ffxiv+innocence+ex+text+guide In PDF document text
    • https://dodimugu.weebly.com/uploads/1/3/4/4/134483739/d6fef3ff.pdfIn PDF document text
    • https://joxenawofin.weebly.com/uploads/1/3/4/3/134342561/babefim_tirumuborigof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405925/normal_5fd68b1a1af10.pdfIn PDF document text
    • https://mabogafopesusa.weebly.com/uploads/1/3/4/3/134307699/nidajax.pdfIn PDF document text
    • https://piwebodowumogoj.weebly.com/uploads/1/3/4/8/134857209/17d0bcd49cfe.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
    • https://static1.squarespace.com/static/5fdc80e9ff99f865bfec01c9/t/5fdce857f8ba5c67af91aa00/1608312919114/6471241742.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/magnetism_physics_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/81418713428.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/97591688894.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/80618504452.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/lekuba.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/autocad_3d_learning_books_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9DF 4636 bytes
SHA-256: 9921b939cff5f946de2bd89e1f91f66bdc631f9df35283e487f9b23b87e7569d
font_01_sfnt_off0000d9c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C6 9760 bytes
SHA-256: 0f10d1f20691d028eb6eb2679ef342406ad886a9128507952826840a6a8a2769
font_02_sfnt_off0000fb4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4C 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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