Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dac35ab0c3b7d88…

MALICIOUS

PDF

85.8 KB Created: 2021-03-24 03:19:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5c510c160b73cc657f1b9b2864d8b193 SHA-1: 2a108697c950fb7173793d2b97907fef31df1f95 SHA-256: 6dac35ab0c3b7d88e04c73cb364e4e7cc0163a2bd9940fbe94de8c267d2ab741
186 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a link farm, with several pointing to disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://resalured.ru/strik?utm_term=what+is+unravel+two+about PDF link annotation
    • https://memetunariva.weebly.com/uploads/1/3/1/4/131454345/fadipap.pdfIn PDF document text
    • http://lizuzezusad.medianewsonline.com/christmas_choir_music.pdfIn PDF document text
    • http://siviveko.getenjoyment.net/zajapaza.pdfIn PDF document text
    • https://mabosuvix.weebly.com/uploads/1/3/4/8/134851695/3672902.pdfIn PDF document text
    • http://jetavimazi.22web.org/fobia_social_tratamiento_cognitivo_conductual.pdfIn PDF document text
    • https://reforolirif.weebly.com/uploads/1/3/4/8/134885236/79ea1430b303f.pdfIn PDF document text
    • https://kezaguwubov.weebly.com/uploads/1/3/4/6/134632481/verolixefeki_josobamakepaji_dorulorilidaf_gesokak.pdfIn PDF document text
    • https://fopokefizig.weebly.com/uploads/1/3/4/5/134525302/nixero-botitovixukod-tojan.pdfIn PDF document text
    • https://vetazewufa.weebly.com/uploads/1/3/2/8/132814418/2709122.pdfIn PDF document text
    • https://kuvukodu.weebly.com/uploads/1/3/1/4/131453249/kekugute-jegilufol-vojavafuxe.pdfIn PDF document text
    • https://liletalezawo.weebly.com/uploads/1/3/4/5/134591830/rokamaza.pdfIn PDF document text
    • https://tejenopaje.weebly.com/uploads/1/3/1/1/131164027/nusuzudaxegaz_zetositoruwu_lufuvuje.pdfIn PDF document text
    • https://vamawawu.weebly.com/uploads/1/3/0/8/130874524/madejaxa.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
    • https://uploads.strikinglycdn.com/files/63feb586-c7dd-4c51-bfda-b322d3eff120/what_happens_in_the_fourth_divergent_book.pdfIn PDF document text
    • http://vebavibokifoko.epizy.com/tilawite.pdfIn PDF document text
    • https://81da36f4-dec6-4bf4-836b-19ed67500659.filesusr.com/ugd/5fd5c1_e731f4275d124cd19426bcec212be2fb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e97dc98-aae1-408e-967a-ad21a73d36a7/43107052669.pdfIn PDF document text
    • https://e5baaea7-7007-41de-9367-4ebf3ed55875.filesusr.com/ugd/8e1900_6364746ee91f4fe0abec878de1bd857e.pdf?index=trueIn PDF document text
    • http://fuxunowelujuxa.atwebpages.com/lighting_busbar_trunking_system.pdfIn PDF document text
    • https://74fc1a11-d445-4ffb-bc6b-7a79e5a65a18.filesusr.com/ugd/097bd5_83a39fae3eb04a96a830b309262043e1.pdf?index=trueIn PDF document text
    • https://2d130471-2a64-48ba-87cf-8f1e86c6acad.filesusr.com/ugd/9c43ec_7377d2bf08754319945b952648746f42.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/44debce8-aa58-4ff1-a9bf-c916b73d3d82/oracle_sql_concat_2_columns.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2443f882-af3f-4e99-abf7-e69f620352d8/gewilufuseredow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09d6ec66-f817-4f60-9d7f-a98587aec6f1/financial_calculator_ba_ii_plus_texas_instruments.pdfIn PDF document text
    • http://pemuvem.epizy.com/what_is_considered_middle_class_income_in_ontario.pdfIn PDF document text
    • https://38aad9b5-7a72-45b8-ac81-9fe73ce82000.filesusr.com/ugd/08338c_6edd3fa24a55469981059ec94a08656d.pdf?index=trueIn 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_off000103c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C0 4960 bytes
SHA-256: 4240d99e663dab563d7d9c0f65a5b26950fd26b1018cd9b7a89894c4edae8ae3
font_01_sfnt_off000114a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A7 11324 bytes
SHA-256: dacae62c31ab762269fbce2d16f8b8a19f93082faf25f8450ce3e060179bba39
font_02_sfnt_off00013b43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B43 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3