Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5fc4ca68461c233…

MALICIOUS

PDF

80.9 KB Created: 2021-03-06 04:43:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 2c73b02ec318230beee5925c1c307ccf SHA-1: 993200ae78964dd9b83e561fc598c561ad39dc8b SHA-256: e5fc4ca68461c23346f90d7d4f7b5c731c6e901d957bbe58c841c8880b5484dc
126 Risk Score

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 and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, with one specifically identified as a link farm hosted on disposable infrastructure, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the presence of many external URIs points towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://lozipotod.ru/wix?keyword=rockport+fishing+report PDF link annotation
    • https://cdn.sqhk.co/tamejenonisi/if9p7gg/telov.pdfIn PDF document text
    • http://nigoguno.scienceontheweb.net/what_are_descriptive_words_that_start_with_o_to_describe_someone.pdfIn PDF document text
    • http://momarivido.mypressonline.com/gigenirikafiwosamos.pdfIn PDF document text
    • https://cdn.sqhk.co/mivuxakadu/ibhdOig/40139273513.pdfIn PDF document text
    • https://cdn.sqhk.co/teketerep/Gjbaid4/30157688902.pdfIn PDF document text
    • https://cdn.sqhk.co/jubawiwa/cYgehjY/sticker_maker_online_free_whatsapp.pdfIn PDF document text
    • http://lisipezasuk.iblogger.org/55106493778.pdfIn PDF document text
    • http://pinopizo.sportsontheweb.net/52955344642.pdfIn PDF document text
    • https://cdn.sqhk.co/buzovegom/B3Wgghe/98156395193.pdfIn PDF document text
    • http://lumufurisazela.mywebcommunity.org/luguvulajadeda.pdfIn PDF document text
    • http://rutopadazemed.22web.org/miya_bhai_dj_song_video_mp4.pdfIn PDF document text
    • http://sabovibin.medianewsonline.com/balozilugusuzoma.pdfIn PDF document text
    • http://bajifepeselok.sportsontheweb.net/coleman_thermoelectric_cooler_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://rolaxaja.rf.gd/macromedia_freehand_mx_free_for_mac.pdfIn PDF document text
    • https://a5a7f18c-b887-48a0-80cc-3627c14345d5.filesusr.com/ugd/609f59_8c6467f726c8472ea3aa0ca23b323a6e.pdf?index=trueIn PDF document text
    • http://peledopa.myartsonline.com/1203227768.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2005fd72-385d-4898-8ef8-7d43e7355be0/1023089575.pdfIn PDF document text
    • https://6c036dbd-b327-4678-b778-de8a2ee7bb50.filesusr.com/ugd/ed64d2_be8c02ab79b14f4da452a9d5a493fff3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/82bc8eec-5f38-414f-8567-5add1683e781/how_to_change_ink_cartridges_canon_pixma_mg2520.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3323ffa-ccee-4364-8957-cf6354a581b5/zorba_the_greek_line_dance_step_sheet.pdfIn PDF document text
    • http://maxegore.epizy.com/psychology_of_color_green.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44c75ddc-bfc3-4a0a-9879-d01b79aafa51/gisavi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a35f782-1f71-4f97-a931-c94a575e686a/12358649297.pdfIn PDF document text
    • http://wobanunep.myartsonline.com/how_to_use_a_mitre_box_to_cut_molding.pdfIn PDF document text
    • http://jokosen.atwebpages.com/what_is_classical_statistical_theory_of_public_administration.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f45b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45B 4896 bytes
SHA-256: 1545abe47d09cd93b4de38e8aa2ea62d2e7c485cc8356ccc0fa8e8bf980de414
font_01_sfnt_off000104fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FC 10196 bytes
SHA-256: 417dd23906af7d2c8581fcd2c58dea56f3def82eda3d0f833f9af60e757e78b2
font_02_sfnt_off000127e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127E0 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3