Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4f532977db095ed…

MALICIOUS

PDF

73.2 KB Created: 2021-03-21 07:09:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 3c513d43936f4de285fb5176dac2d16a SHA-1: b6529ea925fb6324f5a4ada3b13f83123eb7ba08 SHA-256: e4f532977db095edd8507ce8b7f7dafb940a956cb01839bbd2b55d52f0e59efe
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. It contains an embedded URI pointing to 'golowaki.ru', which is likely a malicious domain used to host phishing content or distribute further malware. The document body, though partially corrupted, suggests a lure related to a 'Singer inspiration manual'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/wix?keyword=singer+inspiration+manual+4228 PDF link annotation
    • https://cdn.sqhk.co/gusiloxi/imcOU59/15481814099.pdfIn PDF document text
    • http://atelier-spb.com/al_quran_arabic_to_bangla_pronunciation249de.pdfIn PDF document text
    • http://bluebadgeform.com/fetakozekudunajedon9uyj.pdfIn PDF document text
    • http://septiki-rf.website/tbc_blacksmithing_guide_warmanekrctd.pdfIn PDF document text
    • http://trysoda.pro/5172609427m7bom.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/erjhVPI/invaders_of_the_rokujouma_episode_11.pdfIn PDF document text
    • http://fowironomuk.iblogger.org/xebela.pdfIn PDF document text
    • http://goloszauniver.fun/nepujazimawezazopi6afso.pdfIn PDF document text
    • https://cdn.sqhk.co/jetirivotu/iPhhlja/anime_wallpapers_4k.pdfIn PDF document text
    • https://cdn.sqhk.co/supopareso/649jfhE/flipbike._io_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetijesi/jhl88gi/supercar_robot_transformer_futuristic_supercar_mod_apk.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/e131de41-c647-4c63-9794-7c8502532949/blind_side_leigh_anne_tuohy_net_worth.pdfIn PDF document text
    • http://mexexumekevuk.rf.gd/eureka_optima_lightweight_upright_vacuum_filter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cfd8f13-82ed-4060-8200-fb4168c184d2/gexuvafijawagekijujidaw.pdfIn PDF document text
    • http://dimazobuxijema.epizy.com/2015_ageing_report_european_commission.pdfIn PDF document text
    • http://zifosasexinedi.rf.gd/pudino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6d2f602-e6df-446a-af7d-165bc2071f38/is_there_a_gregor_the_overlander_book_6.pdfIn PDF document text
    • http://xuxivobanirug.epizy.com/girl_guide_cookies_canada_online.pdfIn PDF document text
    • http://vokotofetatevud.rf.gd/anselme_bellegarrigue.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_off0000dbc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC0 5656 bytes
SHA-256: fe1def8c528116d68917880d411f22b01b8205031b3f4722e380d2e44e69c79a
font_01_sfnt_off0000eef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF0 11576 bytes
SHA-256: e2a43034b209b7421f48a50d176054254c8dadb0865f7b15f5605708e79085a0

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