Malicious PDF — malware analysis report

Static analysis result for SHA-256 5470a1a1c14a2e02…

MALICIOUS

PDF

77.0 KB Created: 2021-05-14 16:32:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 69dc33e042cb40ea44e34442691026a3 SHA-1: 1292c9ca144c7a21264afbf6ab88b00b094058e2 SHA-256: 5470a1a1c14a2e026d09ba633d9b6863bd553ef1cc9e62ce8c94cb2ccbaa9001
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a tactic to obscure malicious intent through a large number of links. The presence of embedded URLs suggests an attempt to redirect users to potentially harmful sites, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://druttle.ru/strik?utm_term=pedro+paramo+english+translation+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421461/normal_5febee4ca500e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371788/normal_5fee359646ea6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450506/normal_60276c1bca5c4.pdfIn PDF document text
    • http://volosaty100.xyz/how_to_calculate_displacement_from_distance-time_graph648sn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418566/normal_5fd651f204cce.pdfIn PDF document text
    • http://reestr.site/how_do_i_set_up_airprint_on_my_hp_printerfgmx4.pdfIn PDF document text
    • http://yarrebitteh.online/gejikezojadixilixuxezilenyi67f.pdfIn PDF document text
    • http://mainsale.info/watch_captain_america_the_first_avenger_onlinec7gja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486963/normal_600dff9c0df75.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lizolejixo.rf.gd/nenirelidexepopenon.pdfIn PDF document text
    • http://wejopapoxevore.epizy.com/87894593654.pdfIn PDF document text
    • http://panawokel.epizy.com/body_boss_workout_free.pdfIn PDF document text
    • http://resaruxowepu.epizy.com/beringer_pinot_grigio_nutritional_information.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60fac93e-4bbc-4d49-a024-3c6c4f042c84/excel_sum_function_not_working_properly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3311be9-323b-4499-9705-ee2312ff4533/saxexibo.pdfIn PDF document text
    • http://nogamijabuwemi.rf.gd/degudafo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00aaa26c-67ef-43d2-9bfb-5820e1c20db1/cards_against_humanity_absurd_box.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdaec822-a492-4768-a2ba-e36fff6275f9/kakotupojojux.pdfIn PDF document text
    • http://wenaxanovaniz.rf.gd/surodowavorexekozuruguzov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b0eb2c4-8ca9-48cc-b3cc-73cdd4946854/58592077635.pdfIn PDF document text
    • https://a68e2ff5-bf17-48e3-82d4-ceb975b85758.filesusr.com/ugd/760101_516040013cd940bdad329f248cc5e48d.pdf?index=trueIn PDF document text
    • https://6f46ab72-b8e3-4ec2-8f01-cb5d6491dab7.filesusr.com/ugd/9a120b_02d3b706370d48569e5df2d490636a91.pdf?index=trueIn PDF document text
    • http://merijezogaxik.epizy.com/biomass_energy_notes.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_off0000ecde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDE 5456 bytes
SHA-256: 6ca48031d63cd9d95d52dddd3675cfa4060d3ba5614bf3db8e4cb79fe981568e
font_01_sfnt_off0000ff44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF44 12180 bytes
SHA-256: f6eb15e8f9ffd50c915660b4c1aa2c68071e56d56be17af6eb21194c0bc038f5