Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aedab8b621f2838…

MALICIOUS

PDF

60.1 KB Created: 2020-11-18 12:32:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b618038714565b6628b3d02d113c1868 SHA-1: 11844888d083a79cac95696b8642332f7bfc849d SHA-256: 0aedab8b621f2838c9031c0f6c0b5400d39a2f364620c49fd02ca299615d8fb7
156 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files. One such link, https://traffine.ru/123?utm_term=garage+door+winding+bars+ace+hardware, is flagged as suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through these linked documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • 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://traffine.ru/123?utm_term=garage+door+winding+bars+ace+hardware
    • https://wevuviwujito.weebly.com/uploads/1/3/1/6/131636984/e1ad4eb23.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e3a40e34-922f-4db2-a0a7-2108abb5e223/pikiresa.pdf
    • https://s3.amazonaws.com/dutimajizowa/kana_kanum_kalangal_song_masstamilan.pdf
    • https://uploads.strikinglycdn.com/files/e1919815-7ff6-460a-ac06-9dc493a106ef/jodelo.pdf
    • https://s3.amazonaws.com/lowuwofuxali/arangetra_velai_movie_hd_video_songs.pdf
    • https://uploads.strikinglycdn.com/files/9217685c-b7e0-43c8-8f5d-8b9eea78bc73/9038434008.pdf
    • https://uploads.strikinglycdn.com/files/c2e4c580-11a5-4e87-94cb-817bb07f0235/80692287981.pdf
    • https://uploads.strikinglycdn.com/files/a1717ca1-6e84-4198-ad9c-232f80a5c6fa/webster_collegiate_dictionary_online.pdf
    • https://uploads.strikinglycdn.com/files/27cce735-863b-4712-aca6-252d89c7b1a9/96817193627.pdf
    • https://uploads.strikinglycdn.com/files/03ac26d9-a507-46ab-ba5e-cff8126843cd/43802943518.pdf
    • https://uploads.strikinglycdn.com/files/f216be71-d2b9-4678-aef0-f4d787a7b1ad/how_does_minecraft_towny_work.pdf
    • https://uploads.strikinglycdn.com/files/017201f5-52cb-480b-82ec-e671618ae56b/crosstour_action_camera_manual.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b190.bin
7a5df0d68088510aaceb4163767398bce3a218352b83b7b67b33ec6919b83c87
pdf-font-stream PDF embedded font (sfnt) at offset 0xB190 5432 bytes
font_01_sfnt_off0000c413.bin
8bbf61ea2a556ebee835af266792e1f810cbfd5a49b57107b7671475eebad81d
pdf-font-stream PDF embedded font (sfnt) at offset 0xC413 9336 bytes