Malicious PDF — malware analysis report

Static analysis result for SHA-256 f97e1af95ad9a417…

MALICIOUS

PDF

63.0 KB Created: 2020-11-26 09:47:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ccc995badd0331db1d07efb729d28917 SHA-1: eb1f6afc190013ae2c1ab2b591f3bf1064c45ea0 SHA-256: f97e1af95ad9a417acf53462df29f799f13bf8e5a9ed2b3c2564967ea5adf924
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically indicating phishing and Trojan activity. An external URI pointing to 'trafffe.ru' was extracted, suggesting a phishing lure. No scripts were extracted, but the presence of an embedded URL strongly suggests an attempt to redirect the user to a malicious site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffe.ru/123?utm_term=what+rule+about+the+conch+is+made PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448542/normal_5fa5ece7ece0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383921/normal_5fb409b8edb90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486220/normal_5fafab4a48531.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370541/normal_5fbf153b3f40c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383561/normal_5f9947d82dbe7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/48b72732-d125-401b-9298-d0a83c3c2b06/22150862837.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/nujipa.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/bazaar_movie_song_ming.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/cyberpunk_2020_solo_fashion.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/94152767833.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e814d6c-0d2e-4f6e-81f8-170ba31d39b0/63444321182.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/so_you_want_to_write_a_fugue_midi.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/75353037204.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/zexugitevet.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_off0000bb60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB60 5332 bytes
SHA-256: 408f1413ec23d14b03e5f4ab66090eb131d0f75c654447266dd540416351deed
font_01_sfnt_off0000cd56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD56 9940 bytes
SHA-256: dc5f528af8902f21ffb1f299ab2b0305479e6222f36228f8d92d20a045888615