Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ad8a2b7772b80a1…

MALICIOUS

PDF

77.6 KB Created: 2021-04-20 02:25:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c2b31e2a27d74f9dc368c3b82c6c845e SHA-1: b6656fbc5a0452e48b6d1b2ff591791c0434a9e7 SHA-256: 9ad8a2b7772b80a1f3d5c10e01d98522bb316b6c32776375642749050f595992
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

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://golowaki.ru/strik?utm_term=technical+skills+vs+interpersonal+skills PDF link annotation
    • http://zegererevez.medianewsonline.com/fodofogajotiponujabogigi.pdfIn PDF document text
    • http://wordsidepost.top/12300658534w2aul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484156/normal_6004507ccaef2.pdfIn PDF document text
    • http://wei-nmvc.com/wizards_first_rule_summary5h41u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457332/normal_5fcabacc527b4.pdfIn PDF document text
    • http://ledy66.net/mibelumelijetifasa2m67r.pdfIn PDF document text
    • http://bebalezuve.medianewsonline.com/definicion_de_analisis_de_varianza.pdfIn PDF document text
    • http://nurokojo.mypressonline.com/79992622815.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379234/normal_6001283e5ea8c.pdfIn PDF document text
    • http://experiment.website/nosotuliwupizugato388yv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kipixuge.epizy.com/objective_subjective_language_worksheet.pdfIn PDF document text
    • http://lebozid.epizy.com/bomoj.pdfIn PDF document text
    • http://xabudavadeguvo.myartsonline.com/13302982895.pdfIn PDF document text
    • https://c36efdde-2309-4ce2-a10d-b6df2ce12cd8.filesusr.com/ugd/e98059_a51de0df655449e79cb5912097c6157b.pdf?index=trueIn PDF document text
    • https://b7eb3c74-9f10-4efd-a612-efb7ea03662f.filesusr.com/ugd/7198c1_508fa5f5953f4af2bf5b50918d6322ea.pdf?index=trueIn PDF document text
    • http://doxurisod.epizy.com/14487594755.pdfIn PDF document text
    • http://puvapulugo.onlinewebshop.net/43050985854.pdfIn PDF document text
    • https://6acf0ca1-aa41-4771-8b91-54baff69ee7f.filesusr.com/ugd/7d1dc9_643d88dfdba64184833e7477cd4074f8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/829f51db-07c8-413d-9fed-c40c6cdd442f/miller_trailblazer_models.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9de023a-8e6a-4a29-9d15-99e2a6723627/24449656638.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a7a54fa-ab5f-49ef-9525-b5efbfb44e00/dadusubenaxolovojudama.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c60490d7-75cc-4c6c-86a8-ff57454537ff/cute_newborn_girl_clothes_cheap.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_off0000f505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF505 5092 bytes
SHA-256: 43e9231ca6665f9f37fb691ca397a2748a3880843ee940c8eb6fdb93e441b815
font_01_sfnt_off00010656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10656 10156 bytes
SHA-256: bbcec05dc2fd644c1adb7a7fa0db9d1fe3e60638698d5bfee62b244242ff170c

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