Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a01b31d18764f4e…

MALICIOUS

PDF

76.5 KB Created: 2021-03-05 08:36:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6e36b2231fec238db095670a2dfdfc9f SHA-1: ca6210023871778c6b69e2d468369692db28dc1a SHA-256: 1a01b31d18764f4e72fe8fc714de7fb50ce59c425daec09aa70dafaad5538e6f
126 Risk Score

Malware Insights

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

The PDF file contains numerous links, many pointing to disposable domains, and is flagged by ClamAV as a phishing trojan. The ML classifier also strongly indicates maliciousness. The primary lure appears to be a fake search result for a movie title, directing users to the URL https://bologen.ru/award?keyword=is+the+other+side+of+heaven+2+a+disney+movie. No scripts were extracted, but the overall structure suggests a phishing or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/award?keyword=is+the+other+side+of+heaven+2+a+disney+movie PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367648/normal_600a57668ad98.pdfIn PDF document text
    • http://kittyplay.online/atoms_and_molecules_worksheet_middle_school1i4ry.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379960/normal_5fd1753718701.pdfIn PDF document text
    • http://fejukoturig.medianewsonline.com/darwins_five_principles_of_natural_selection.pdfIn PDF document text
    • http://bigops.fun/framed_impact_20_bmx_bike_silvern9ki2.pdfIn PDF document text
    • http://muzibatixabu.mypressonline.com/neca_manual_of_labor_units_2017.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420589/normal_60185cfebbd92.pdfIn PDF document text
    • http://feelslike35.com/text_structure_worksheet_101ctv0.pdfIn PDF document text
    • http://dfds.in/robotics_modelling_planning_and_controlvt50x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384642/normal_6034ea8770ef2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481052/normal_6032a979484ad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://migotugiwuzefez.epizy.com/crca_sheet_hardness.pdfIn PDF document text
    • http://pilixizetexupaf.epizy.com/zuzemovivujoduramoxipo.pdfIn PDF document text
    • https://8b5ac0f3-2bc4-49a6-9a99-2541af31b215.filesusr.com/ugd/f2ef67_a3813db00dee4aef9ae391680e0ec0e6.pdf?index=trueIn PDF document text
    • https://e8677ced-6330-435e-8237-200fb10408a4.filesusr.com/ugd/a4c1fa_98f4c7ee3c4f4436b0f036aedf9e9241.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b489181d-54d4-426a-80aa-6eb941bdaaf1/tedoxibexudusogipob.pdfIn PDF document text
    • https://6eed613e-cbae-405e-b458-9655ef9033f8.filesusr.com/ugd/e4f6f0_675000d3e3254559813be606962ee9ea.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9d7ff5c-9e2e-4368-b625-86f762c95be1/13093335113.pdfIn PDF document text
    • https://d1159ab4-cbf5-42eb-897b-83a5e94cd7da.filesusr.com/ugd/536122_5e6fda2d77ef47bcb9bffdf10666f1b7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b461bd11-62c4-4b61-989f-1c541071e3ec/strategic_management_final_exam_multiple_choice_questions_and_answers.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_off0000ef63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF63 5348 bytes
SHA-256: 2d7da3be12cdcb1c00664bc554f438d1f0833aff13ce6085514a90b6b96510de
font_01_sfnt_off00010174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10174 10276 bytes
SHA-256: 76b96168751efa1ba1ccf2686f87a0464335e4bad57911f223ea29072dfd6794

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