Malicious PDF — malware analysis report

Static analysis result for SHA-256 980d69c0d4aa9e20…

MALICIOUS

PDF

106.3 KB Created: 2021-06-07 21:28:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 369c0661d2981543bc4ff8ef553f5f53 SHA-1: 4aeec1e955c32d66ac2a8cae05512225a1f4080c SHA-256: 980d69c0d4aa9e203df60ff3a98e361d4463d689fca9411ad94bb34d004e5582
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by heuristics as a link farm on disposable hosting. ClamAV detection and ML classification strongly indicate malicious intent, specifically phishing. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://catamma.ru/pbw?utm_term=taking+sides+clashing+views+in+adolescence+pdf PDF link annotation
    • https://pegutezupo.weebly.com/uploads/1/3/2/7/132740329/vijaj.pdfIn PDF document text
    • https://voduzivesaduv.weebly.com/uploads/1/3/4/4/134456438/9239986.pdfIn PDF document text
    • https://xuwukebi.weebly.com/uploads/1/3/4/4/134472968/kazetigufefokox-poleg.pdfIn PDF document text
    • https://nasubodido.weebly.com/uploads/1/3/4/3/134313400/7cae18f04c30.pdfIn PDF document text
    • https://lapefobok.weebly.com/uploads/1/3/4/6/134663543/f2728640272a.pdfIn PDF document text
    • https://molipose.weebly.com/uploads/1/3/4/6/134644393/wagitife.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zipiwume.pbworks.com/f/wamowobujapalekelej.pdfIn PDF document text
    • http://detomipipu.pbworks.com/f/quantos_metros_quadrados_um_metro_cubico_de_concreto_cobre.pdfIn PDF document text
    • http://poforezufovu.pbworks.com/f/how_to_update_mxq_android_box.pdfIn PDF document text
    • http://gibuwodebu.pbworks.com/w/file/fetch/144489708/biwijiwir.pdfIn PDF document text
    • http://zuxanoguk.pbworks.com/f/cimbra_de_losa_maciza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c552a4d-8e21-4715-9e87-3f0ea44d2e90/lara_croft_relic_run_mod_apk_old_version.pdfIn PDF document text
    • http://vawaguzidatu.pbworks.com/f/pre_writing_activities_worksheets_free.pdfIn PDF document text
    • http://nukuxim.pbworks.com/w/file/fetch/144529923/jagojatapiwavewu.pdfIn PDF document text
    • http://xifatarege.pbworks.com/f/how_to_fix_msvcp140.dll_missing_error_windows_10_8_7.pdfIn PDF document text
    • http://lopofemusun.pbworks.com/w/file/fetch/144660897/troy_bilt_pto_horse_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8a58296-adee-474b-90a2-d9db9bf1b9b9/did_christianity_come_from_catholicism.pdfIn PDF document text
    • http://kegogaxevu.pbworks.com/w/file/fetch/144704229/napejofipa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56c0e841-237b-40f7-a0ee-2296a5e56f13/27859194218.pdfIn PDF document text
    • http://duziruromeja.pbworks.com/w/file/fetch/144786879/worksheet_dihybrid_crosses_unit_3_genetics_answer_key.pdfIn PDF document text
    • http://visetululiv.pbworks.com/w/file/fetch/144423363/best_rainbow_vacuum_cleaner.pdfIn PDF document text
    • http://xetibubib.pbworks.com/f/emulator_ps3_untuk_android_apk_with_bios.pdfIn PDF document text
    • http://mulasamesi.pbworks.com/f/sioux_city_iowa_police_records.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_off0000d7c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C8 44512 bytes
SHA-256: e325479b61f1663bdd8cc10986c8c18e2d61749a1eb83c5d8b731316a495258c
font_01_sfnt_off00016019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16019 5488 bytes
SHA-256: 1d894a9217742f80cb14475a502deb8b7f3aec3981a5ab267beb434d0f8ac3a8
font_02_sfnt_off000172df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172DF 10932 bytes
SHA-256: b55848e5184a3ed5b8d74e68f71925162bd9bac7c4fab581cd82876a7aa26c7c