Malicious PDF — malware analysis report

Static analysis result for SHA-256 038d9d6f05a54703…

MALICIOUS

PDF

75.0 KB Created: 2021-03-10 12:04:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 70bffa49081fc7f4cbe89ba775611e72 SHA-1: bd4af77522a9dda0896f8592054e2c56bd95dd58 SHA-256: 038d9d6f05a547039a7f039473fc177eed1779776cff39be86a6781a7971cd3d
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/wix?keyword=the+third+wave+alvin+toffler+pdf PDF link annotation
    • http://kerosijuvibeg.scienceontheweb.net/2793431782.pdfIn PDF document text
    • https://cdn.sqhk.co/kurotevu/f4z2giO/zuxasudosarusazaxopo.pdfIn PDF document text
    • https://cdn.sqhk.co/nupasoxure/ijTiagi/the_sims_2_ps2_cheats_unlock_all_objects.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370063/normal_6041975843009.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466398/normal_60354c0be3606.pdfIn PDF document text
    • http://mafejaruvoje.sportsontheweb.net/pegasus_single_handle_kitchen_faucet_repair.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478703/normal_5fe7bddb1f300.pdfIn PDF document text
    • http://dukipor.iblogger.org/wulanofom.pdfIn PDF document text
    • http://pokupka.space/think_public_relations_2nd_edition_downloadr5c3w.pdfIn PDF document text
    • http://fartook.online/86511931488aqs5f.pdfIn PDF document text
    • https://cdn.sqhk.co/vemetafije/fZsqIt6/54756285432.pdfIn PDF document text
    • http://gixodugesu.medianewsonline.com/how_do_i_program_my_spectrum_remote_ur5u_8780l.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tuxefovibipudun.epizy.com/tibarekasaguvepunuvir.pdfIn PDF document text
    • http://xusasun.rf.gd/krishna_aarti_bhajan.pdfIn PDF document text
    • http://vobafuge.epizy.com/catfish_farming_manual.pdfIn PDF document text
    • http://rususekobijo.myartsonline.com/multiplication_tables_up_to_30.pdfIn PDF document text
    • http://fomonew.rf.gd/how_to_use_ipega_bluetooth_controller_on_pc.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_off0000ebb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB3 5052 bytes
SHA-256: d9ea63ad8c73963bbc9ef85e2739dace9cb1e76c7a88dab53dc970ccf312c777
font_01_sfnt_off0000fcf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF8 10000 bytes
SHA-256: 7ba66e4cdb0ee57d0f718bf73ac641688efe5b5552246acad4c2acffb2cdb637

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