Malicious PDF — malware analysis report

Static analysis result for SHA-256 4defa2b88fe6bc47…

MALICIOUS

PDF

95.2 KB Created: 2021-03-19 17:26:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 7e17150ceffeef9d274479ac1c448afe SHA-1: dad9916e913e762917c34edf608c400e711db58f SHA-256: 4defa2b88fe6bc47aa19fc29c54c583e294e3438dbea915185db35a7b2b84e2a
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 pointing to disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for distributing further malware or conducting phishing operations. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to compromised or malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://xajibur.ru/wix?keyword=polearm+master+pathfinder PDF link annotation
    • http://coupons2020.info/sozawijc3qto.pdfIn PDF document text
    • https://cdn.sqhk.co/joxutedunik/eNiephe/weather_in_orlando_fl_radar.pdfIn PDF document text
    • http://fb-copyright-help-from.com/konabajokinugururokonixiffptvj.pdfIn PDF document text
    • http://menbp.online/67400364844xvu80.pdfIn PDF document text
    • http://storedubai.shop/dawapexuga6v2z3.pdfIn PDF document text
    • http://ukranews.site/fomudimikiw55gf.pdfIn PDF document text
    • https://cdn.sqhk.co/gabebutiz/dmBigib/xogogefuboboraforofemeraf.pdfIn PDF document text
    • https://cdn.sqhk.co/baxoladipezu/wjb9hh5/sprint_drive_review.pdfIn PDF document text
    • https://minuzivajod.weebly.com/uploads/1/3/4/3/134354575/gomofola_rezafifabot_fazajakepidama_jowuxalor.pdfIn PDF document text
    • http://mini-cam1.club/glasgow_kiss_sheet_music9vm7i.pdfIn PDF document text
    • http://13millions.store/buvetujo3girq.pdfIn PDF document text
    • https://vekeliludodim.weebly.com/uploads/1/3/4/7/134745250/vebezidumomam.pdfIn PDF document text
    • http://tehnikator.ru/augusto_cury_o_semeador_de_ideias9k6vf.pdfIn PDF document text
    • https://vonepegoparopew.weebly.com/uploads/1/3/4/3/134352316/2c6143d38.pdfIn PDF document text
    • http://afracheat8.xyz/50354990010dtqco.pdfIn PDF document text
    • http://santecmb-sarl.com/what_are_missguided_shoe_sizes_likerarud.pdfIn PDF document text
    • https://cdn.sqhk.co/simikitivo/xmVijjA/44942407834.pdfIn PDF document text
    • http://plsale.pro/boolean_algebra_solved_problemsustk0.pdfIn PDF document text
    • https://dubujede.weebly.com/uploads/1/3/4/6/134607356/kidabapalowivez.pdfIn PDF document text
    • http://ighelpcenter.xyz/98049026307c12lu.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/68c232af-6c0f-4aa5-831c-4978f9605cf7/denedubekomuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d24347f6-f2cd-41da-b1e0-b7e1e06656ba/three_positive_effects_of_volcanoes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/203563d2-c471-4ea6-9825-7eb22139ced6/covers_of_carry_on_wayward_son.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_off000139e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139E3 5280 bytes
SHA-256: 5c70e49ba8470c3e6db5e2e83b4d9417b5641fa726c437ba804ac16c9be57c5e
font_01_sfnt_off00014bac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BAC 10512 bytes
SHA-256: 2553df0ae01fc5a3784a1aee679a47ae2e0c4301994027e66447e5d6bc5f697d

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