Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceff46265280b0aa…

MALICIOUS

PDF

73.2 KB Created: 2021-03-18 17:46:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: eec2bb1942fc68dc7175c137f1011262 SHA-1: 32ffd4ffa9854dcb6d3cbabb1b7296f801b2e1e9 SHA-256: ceff46265280b0aac4af37b06c5d63f594838fc9e6327c0f1b4c00725bc5ff07
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or malware distribution attempt. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates the PDF is part of a link farm designed to redirect users, likely to a malicious payload or phishing page. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics strongly suggest an attempt to trick users into downloading further malicious content.

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://bologen.ru/wix?keyword=fundamentals+of+physics+9th+edition+pdf+solution+manual PDF link annotation
    • https://cdn.sqhk.co/vizejagojib/sPjfEqv/schedule_planner_template.pdfIn PDF document text
    • https://cdn.sqhk.co/wopidaxiwuk/Shejfgg/87579641458.pdfIn PDF document text
    • http://onesmall.space/assembler_plusieurs_en_1_seulujzes.pdfIn PDF document text
    • http://biggymstoe.com/bounce_tales_java_appxh6mk.pdfIn PDF document text
    • http://pojapir.mygamesonline.org/south_american_countries_and_capitals.pdfIn PDF document text
    • http://rebelliona.online/civ_6_gathering_storm_germany_guideu5v1r.pdfIn PDF document text
    • https://cdn.sqhk.co/zuvomafoda/jgjhfhe/drift_wars_apk_para_hilesi.pdfIn PDF document text
    • http://sabovibin.medianewsonline.com/kujevewar.pdfIn PDF document text
    • https://cdn.sqhk.co/motakolilo/gjU1U65/dirt_road_trucker_3d.pdfIn PDF document text
    • http://itasummer.fun/13350387093961nl.pdfIn PDF document text
    • http://xofofumireke.mypressonline.com/bunabamekaporisa.pdfIn PDF document text
    • http://mobile-media.moscow/wodopojuwozuj3xcx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sewoxoxitif.rf.gd/najre_churane_lage_ho_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/dexodekelaseki/doxobolis.pdfIn PDF document text
    • http://xugiben.epizy.com/57325291034.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e574e33-85ff-475a-9038-e5f6f20b1a17/how_to_look_up_license_status.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/47557652195.pdfIn PDF document text
    • http://sajulugebimisu.myartsonline.com/laguje.pdfIn PDF document text
    • http://wunozoviwo.epizy.com/givanumikewo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0be7d0b2-518a-4807-8ad7-296d0efac2d7/what_age_is_ahsoka_in_clone_wars.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/xafepejenajakidupetukim.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_off0000dae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE0 5512 bytes
SHA-256: b95b312822ba82b15f3ee7f9996a2ba496f36939eeb2706468c1b5abf8ca1742
font_01_sfnt_off0000ed87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED87 12140 bytes
SHA-256: 74283561bb0bd86321e8d99da733394b4e0c90c305207c64bbc7ee17dc950e8c

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