Malicious PDF — malware analysis report

Static analysis result for SHA-256 b13190644b76063c…

MALICIOUS

PDF

78.0 KB Created: 2021-03-21 07:33:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e0bff1d57384130e0ecf5e13faaf6c3e SHA-1: b7c747b37088357d7a2ebadc74f3006e87e14a3a SHA-256: b13190644b76063cf1109725d1095ea4a30a406bab4abe4f4d2db0b9004cde81
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The document contains numerous external URIs and is identified as a link farm hosted on disposable domains, a common tactic for phishing or distributing further malware. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest an intent to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://kuzutuzo.ru/strik?utm_term=peavey+bandit+65+footswitch PDF link annotation
    • http://juxoxelobonoje.22web.org/dolby_atmos_android_auto.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420230/normal_6004a571b7a2a.pdfIn PDF document text
    • http://requiremcgood.com/fawumijubikuvamefaqqwo.pdfIn PDF document text
    • http://vebuwovivulab.mygamesonline.org/addressing_modes_of_8086.pdfIn PDF document text
    • http://pubguckazan.com/hojas_de_pauta_montessori_para_imprimir0ayrs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454678/normal_5feb958ddd89b.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/when_all_of_the_authorized_shares_have_the_same_rights_and_characteristics_the_stock_is_called.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392664/normal_602cf76240cc0.pdfIn PDF document text
    • http://kimokabif.medianewsonline.com/biochemistry_notes_for_medical_students.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383451/normal_5fc937006f69c.pdfIn PDF document text
    • http://luminar4-download.xyz/dadipigoxijivanow917m1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445864/normal_601e216d0d117.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413703/normal_604e1352a55c7.pdfIn PDF document text
    • http://pazifelurup.medianewsonline.com/64099173468.pdfIn PDF document text
    • http://ruszaimclub.ru/26049355131w2moo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bepofitome.rf.gd/vixuwinafo.pdfIn PDF document text
    • http://mojozore.myartsonline.com/anatomie_et_physiologie_de_l_oeil_humain.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd0a6a39-7d35-4d40-a364-2bbdaef1609f/vans_old_skool_checkerboard_white_and_orange.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06c469d7-5aed-43d8-98f6-0c252d61eea2/which_philips_wake_up_light.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b374b24-49d6-4b43-b312-138b7f16712e/evolution_is_only_a_theory_not_a_fact.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eee85bd7-acc6-407d-a512-761a455f589d/zarowojemexuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/086583e3-bc9b-4312-8731-0686a5a4670d/how_fall_in_love_with_you.pdfIn PDF document text
    • http://luvibiw.epizy.com/dalibad.pdfIn PDF document text
    • http://wipapirub.epizy.com/97104378769.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_off0000f094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF094 5656 bytes
SHA-256: 5aa26ebd9f2386d1c0a9e42f814a86528bfab62d38853ef06ab5a3e101b4c895
font_01_sfnt_off00010403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10403 11204 bytes
SHA-256: 1a205078b84d909bed579be8ccf070c19a16a0bec2e0a6e981c797b04b58c640

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