Malicious PDF — malware analysis report

Static analysis result for SHA-256 6256ac3ae6abe770…

MALICIOUS

PDF

81.9 KB Created: 2021-02-23 23:07:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 9c0de967420253e33ed7a4197a729fcf SHA-1: 5a0b03f67ad54a1d7a2905e7a186afe7c1ec7d8e SHA-256: 6256ac3ae6abe770718ad8742f1a03b5afc05a9a5abf7eb810eb6935970d6825
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 trojan. It contains numerous embedded URLs, with one prominent URL pointing to a link farm designed to redirect users. The presence of external URIs and the link farm heuristic suggest an attempt to direct users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/aws?utm_term=lg+washer+dryer+combo+repair+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490918/normal_60208aa085730.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/Ct16agg/22541025637.pdfIn PDF document text
    • https://cdn.sqhk.co/juxefirapuf/igihD0x/wosoxawoxonaladukosamop.pdfIn PDF document text
    • https://cdn.sqhk.co/bilanogakiw/dGXt7CE/rafikirotidobazez.pdfIn PDF document text
    • http://sekejibugu.iblogger.org/uncle_tom_s_cabin_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450727/normal_600be49ddf62e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470832/normal_5fd8d3a61c32f.pdfIn PDF document text
    • https://cdn.sqhk.co/rutunidosaw/jeiefAO/66481813377.pdfIn PDF document text
    • https://cdn.sqhk.co/pefisemise/hge1jef/ikea_hours_renton.pdfIn PDF document text
    • https://cdn.sqhk.co/buzomesil/bLhaLjg/9956615748.pdfIn PDF document text
    • https://cdn.sqhk.co/minofavazu/Diflhe6/wopiwegixewewopavitito.pdfIn PDF document text
    • https://cdn.sqhk.co/tinupolureg/jbjcifM/movistar_mexico_prepago.pdfIn PDF document text
    • https://cdn.sqhk.co/danopefasuf/6zAB5z9/tufuto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370985/normal_6015b74727c1d.pdfIn PDF document text
    • https://cdn.sqhk.co/bivuwusim/cWgc0v7/hot_wheels_drift_king_treasure_hunt.pdfIn PDF document text
    • http://zufutefej.22web.org/the_righteous_mind_free.pdfIn PDF document text
    • https://cdn.sqhk.co/rubekafux/ijtXjef/betigavowo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://juxawewoguseku.epizy.com/hotel_stay_gift_voucher_template.pdfIn PDF document text
    • http://kutifakibidi.rf.gd/consul_nginx_template.pdfIn PDF document text
    • http://ruxomipeb.epizy.com/witutubimusirutuv.pdfIn PDF document text
    • http://dapuzuro.epizy.com/texto_argumentativo_ejemplos.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_off00010230.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10230 5760 bytes
SHA-256: 233e61c71e912a8113c47d4425e31e2a331618c83971f199ad3792b336949025
font_01_sfnt_off000115bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115BB 10600 bytes
SHA-256: 2ab3dbc227fdb29bf91cb16777bc307f3cb3216c23204b5012c1b7383f43e8c4

Open this report in the interactive analyzer, or submit your own file for analysis.