Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b531a7bf7cd1083…

MALICIOUS

PDF

71.5 KB Created: 2020-11-25 21:11:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ad4d9e66048e27de6bc072ddc80f297 SHA-1: 1efe5fbea0411638ddc1478d5a5d6b767d198f8b SHA-256: 0b531a7bf7cd108350992e4a14dad79f8afaae723dabf743e42810adbd3befee
156 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm and a phishing attempt, with a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The embedded URL 'https://trafficel.ru/aws?utm_term=efectum+hack+mod+apk' suggests a lure related to hacking tools. While no scripts were explicitly extracted, the PDF structure and heuristics strongly suggest malicious intent for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/aws?utm_term=efectum+hack+mod+apk
    • https://vuxarujetununo.weebly.com/uploads/1/3/4/4/134437765/baranig_bavimavun_bejekibokerax.pdf
    • https://cdn-cms.f-static.net/uploads/4367624/normal_5fa30b7a5a728.pdf
    • https://bilewazivabo.weebly.com/uploads/1/3/2/8/132816117/8273359.pdf
    • https://mogezisatizate.weebly.com/uploads/1/3/0/7/130775403/nenabiwegit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4db6e0ed-c0dc-40b1-9411-6f3d2f837b25/41270674582.pdf
    • https://uploads.strikinglycdn.com/files/fe8b70d6-d133-4b95-9fe3-08cce15160d0/solitaire_chess_game_rules.pdf
    • https://uploads.strikinglycdn.com/files/b19237b8-d9cf-462b-b364-1c0ec8d1d473/xepupodonezudobetoto.pdf
    • https://uploads.strikinglycdn.com/files/0aa515ee-5c40-4e95-aa80-fd571f9d1606/jonopofisogimizev.pdf
    • https://uploads.strikinglycdn.com/files/66a0e23c-8f4b-4bbd-89e4-e1ab730af94c/tewimegup.pdf
    • https://uploads.strikinglycdn.com/files/8583a4c8-26f6-457c-b811-2d1670e07729/vafidetu.pdf
    • https://uploads.strikinglycdn.com/files/b7159bfb-be73-4f54-9468-f73226b03d7d/dotusizitebilixurozixeb.pdf
    • https://s3.amazonaws.com/megelugik/wings_of_fire_book_5.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf4f.bin
08e22724f1e53a62acf28a85a72e1515698429482dde3cad9cb8218a43ad55b5
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF4F 5112 bytes
font_01_sfnt_off0000e092.bin
fa18d4e6b586d5a586c7a015be74eac19f74e205b1def09f6da634362145d488
pdf-font-stream PDF embedded font (sfnt) at offset 0xE092 2816 bytes
font_02_sfnt_off0000ec5a.bin
62d921d1644412917a270afae1ce6b4efdbab58012b91afcec106e33b64a6d63
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5A 10788 bytes