Malicious PDF — malware analysis report

Static analysis result for SHA-256 5010ccb2c65e23d0…

MALICIOUS

PDF

96.7 KB Created: 2021-04-05 14:27:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: a7e5b0789c2ab5633c66990e1fb0ef8b SHA-1: 6e0e3c7fca742151143b6a93b80b135fc152886a SHA-256: 5010ccb2c65e23d0d5d26f3b913ce8a3e08ca6917ad9f21efd3b6f43102f0635
126 Risk Score

Malware Insights

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

The PDF document contains embedded links and heuristics indicate it is a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The presence of a URL with a 'royal mail international parcels cost' UTM term suggests a social engineering lure.

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://vilenefex.ru/aws?utm_term=royal+mail+international+parcels+cost PDF link annotation
    • https://xobijuveja.weebly.com/uploads/1/3/1/6/131606615/9740871.pdfIn PDF document text
    • https://zokolukesowi.weebly.com/uploads/1/3/0/7/130776120/0613dbe1f191b33.pdfIn PDF document text
    • https://guxenebulofoto.weebly.com/uploads/1/3/2/8/132814975/kesadabep.pdfIn PDF document text
    • http://zabavnyi-slon.ru/fabuwapanugevunodusewix4s4fy.pdfIn PDF document text
    • https://piturerakilapes.weebly.com/uploads/1/3/0/7/130775197/2801e8.pdfIn PDF document text
    • http://boost-shop.xyz/ancient_roman_empire_facts02yaf.pdfIn PDF document text
    • https://cdn.sqhk.co/zolulesar/bgc7Sie/83064715540.pdfIn PDF document text
    • https://cdn.sqhk.co/woledibiroju/g8hgJUJ/rasevujijupoxuduki.pdfIn PDF document text
    • https://widafesisitix.weebly.com/uploads/1/3/5/3/135321065/434305.pdfIn PDF document text
    • https://valabonef.weebly.com/uploads/1/3/1/3/131379230/rogodafa.pdfIn PDF document text
    • https://cdn.sqhk.co/ragejeli/ijdeibl/wooden_hamster_cages_cheap.pdfIn PDF document text
    • https://vobudofokivelux.weebly.com/uploads/1/3/4/5/134599261/zunozororu_rikamurawot.pdfIn PDF document text
    • https://tuzuratodaf.weebly.com/uploads/1/3/0/7/130738639/logogonisomig.pdfIn PDF document text
    • http://mosquito.codes/free_3d_shooting_games_for_laptop7qg32.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/41347ab5-5fed-49c6-b872-6a218c156939/30206361712.pdfIn PDF document text
    • http://xonizud.epizy.com/australia_visa_application_form_png.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d539f47-0ff9-4abf-88e1-a491af5b2125/73904746038.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b16aaab2-b313-4880-902f-dde706f6591d/2009_toyota_camry_hybrid_used_price.pdfIn PDF document text
    • http://pudedenos.epizy.com/minccino_evolve_forms.pdfIn PDF document text
    • http://xuwizigev.rf.gd/86316096935.pdfIn PDF document text
    • http://fasasipapuzu.rf.gd/taforosogunuwavuribimumu.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_off00013415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13415 5188 bytes
SHA-256: 1165498ebdbfa19397cd43c0062bad265c911ba4076c65d06b31f80168eb7cf0
font_01_sfnt_off000145af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145AF 15008 bytes
SHA-256: 83f97fb9c9c4371c6844ec9385dac5b9220518847ce28dd35ec4989861a02928

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