Malicious PDF — malware analysis report

Static analysis result for SHA-256 9da2bf717c0e2361…

MALICIOUS

PDF

139.9 KB Created: 2021-03-27 23:11:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: ffb750a9efb5f8f90de968d567c10faa SHA-1: 8ebab64cb3f73b93696bf99438287f4e30f83354 SHA-256: 9da2bf717c0e2361c8f90c000751786ac74a7f7a47320c4f505c309a6c1a02cd
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of techniques used to redirect users to malicious sites, likely for initial access via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://mezovuduw.ru/award?keyword=beowulf+synopsis+pdf PDF link annotation
    • https://cdn.sqhk.co/xotolodi/diayhcO/95522660722.pdfIn PDF document text
    • http://sdfsdfsdf.shaketorch.com/how_do_you_program_a_black_and_decker_12_cup_programmable_coffee_maker.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409244/normal_5fe548776ddce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402960/normal_605d9276dcac1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501206/normal_6034a00ab7747.pdfIn PDF document text
    • https://cdn.sqhk.co/naxibibu/hfShghc/vijeta_defence_academy.pdfIn PDF document text
    • https://cdn.sqhk.co/midipumep/jid5ha0/riwumogejedirorezipomuf.pdfIn PDF document text
    • https://cdn.sqhk.co/bomemenun/LgcJc8h/35058136601.pdfIn PDF document text
    • http://fupomogusi.22web.org/19944880087.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501654/normal_5fe239ef41b06.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458412/normal_5fc958e29697c.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://36c7e617-1221-4173-b726-d5bce2878801.filesusr.com/ugd/610d21_d7480569bd3d4d8faced2b1553a3f655.pdf?index=trueIn PDF document text
    • https://b64dd490-e5b9-492f-89ff-e398ecee904c.filesusr.com/ugd/5926b4_babd9d8b8cf448a9a3e63b160aaff76e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rimepusox/54226049120.pdfIn PDF document text
    • https://dd7ee03d-3646-4e01-a1e1-4c0a7e2c9e57.filesusr.com/ugd/d7ba0f_0abfc54ac7cb4fdf8192bbcbef194838.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/34997990768.pdfIn PDF document text
    • https://63c5840e-267c-49ed-94d3-fc9f9d8b9c0b.filesusr.com/ugd/8c5bc8_9d5c4a40a30d460bb219637f40a1d277.pdf?index=trueIn PDF document text
    • http://mofobasu.rf.gd/dujidizeziz.pdfIn PDF document text
    • https://50fe66f1-00be-429c-ab6c-57a9f80d6ab9.filesusr.com/ugd/39cb9d_01581f6cd8a84d07944cd4620e779226.pdf?index=trueIn PDF document text
    • https://8e12fe21-47c1-448c-af9e-883e7c84523b.filesusr.com/ugd/52ac5e_2e1ac18601ea4ab49b73c04d3494b2a0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wupuxus/borazetubemuvozedej.pdfIn PDF document text
    • https://ec2d952e-5494-46d8-b841-fee222248b17.filesusr.com/ugd/9713d5_454c73a842734786b032152e803f50c4.pdf?index=trueIn PDF document text
    • https://770cee9b-59ea-4c2b-ae8d-aad83b0abb79.filesusr.com/ugd/8b25c7_0bc14063bbdb43c7903339c80271d43e.pdf?index=trueIn PDF document text
    • http://gejajute.epizy.com/ielts_test_with_answers.pdfIn PDF document text
    • http://kesajuwigiferu.epizy.com/the_skillful_huntsman.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_off0001d612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D612 4772 bytes
SHA-256: 810df117fe05e6d8a21f79714bc9e699269c7eaddbb627a21bd3f43540bc4a05
font_01_sfnt_off0001e673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E673 14732 bytes
SHA-256: fb3f4260eec55609e64a1e7d0ed60a68ef3cebf3e18acc1b10ccb3dd22f48410
font_02_sfnt_off000213b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x213B9 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e