Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5540b126fa030d4…

MALICIOUS

PDF

81.3 KB Created: 2021-04-30 10:49:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 7b987c0610903caa76bdacde0150e09f SHA-1: d4ac286b43d3850eb9518e2935e71f469bdf4e87 SHA-256: e5540b126fa030d4dffefbb59fd161e04e5f9445de96bee5fead8eb908d0cac5
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL that redirects to a disposable hosting service, which in turn points to a suspicious domain 'vilenefex.ru'. This domain is likely used to host phishing content, masquerading as a motorcycle manual to deceive users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://vilenefex.ru/strik?utm_term=2010+ktm+300+exc+owner%2527s+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421934/normal_604f2d25a35a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366408/normal_5fcef8776e425.pdfIn PDF document text
    • http://shoop-ff.ru/machine_gun_preacher_full_movie_freeefzx8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479707/normal_5fedf3b8cf6fe.pdfIn PDF document text
    • http://reduslimitaly-official.site/78637089649zytud.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://stankovit.ru/what_does_parallel_lines_mean_in_photographyhn28n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375357/normal_5fe84dfacbcc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479904/normal_604a731cec7c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464700/normal_5fdb8aebeabb6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459319/normal_5fca84f8579a9.pdfIn PDF document text
    • http://pitushok.space/rotating_brave_switch_reviewo7huj.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://uploads.strikinglycdn.com/files/50020189-72f8-4bff-8c82-9180d71928ca/53020358893.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/alacran_enamorado_libro_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/18817672897.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ad6643d-7bed-4038-8aa4-c50f39c6be48/eddie_bauer_stroller_blanket.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b25b2b6e-b1ee-49f7-b6e7-2b243bb2f684/what_are_three_capital_market_instruments.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/sijazoruzefuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9de8c2a7-336d-4f8d-b9bc-b6a85a2e936b/56583538194.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/470463df-2e25-47ed-8e4a-8b3151909226/xotasab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0077667e-379d-41cc-a8c8-3bc688dd45d8/differential_calculus_rate_of_change_problems_and_solutions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecc70820-86a1-40a1-af97-1e87f5c18465/76997177830.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/155ec72e-5cdd-4652-abda-a31fee40c98a/liars_dice_simple_rules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3e8b413-41ea-46b2-b383-99a2e0d58d84/28438550819.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20d3803f-1f9b-47d9-89b7-1239fa01d97f/pewalokozukabamedo.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_off0000f2e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E2 5432 bytes
SHA-256: 3033d638511ea689aabb4e6fdbd33571e73e85433f055b792bf417a0873302b6
font_01_sfnt_off00010558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10558 10528 bytes
SHA-256: 6693b50321f96f3b4959d0af7c365f1075efafaae528f272acfdd827a7a74f49
font_02_sfnt_off0001292d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1292D 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c