Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c19999a0d8250f9…

MALICIOUS

PDF

88.5 KB Created: 2021-04-17 15:28:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 3cc526327fcb101602aa38c694253d9c SHA-1: 919d0dca8275837d95c84ca9d7fea0b6923a5ff7 SHA-256: 2c19999a0d8250f9413d060c39dc027a1392f651ce67e67d5154ce161fb1aa98
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing attempt. The presence of embedded URLs and the PDF structure indicate it's designed to redirect users to potentially harmful websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://golowaki.ru/strik?utm_term=irobot+braava+jet+m6+black+friday+2019 PDF link annotation
    • https://cdn.sqhk.co/vekuperik/b2EibUI/geek_vape_gbox_squonker.pdfIn PDF document text
    • http://xuzazijup.22web.org/frise_chronologique_mouvements_littraires.pdfIn PDF document text
    • http://muwabiva.iblogger.org/zelumutijawudenapepolavam.pdfIn PDF document text
    • http://zonuvak.medianewsonline.com/proving_congruent_triangles_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/mewobonovagi/gfa0Lha/mikonisoxuwikirerifipoxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426820/normal_603ba1232e675.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/tzjcGet/subway_surfers_princess_runner_mod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375885/normal_5ffa3aeaadb1c.pdfIn PDF document text
    • http://jefopojat.iblogger.org/deadlift_upper_back_form.pdfIn PDF document text
    • https://cdn.sqhk.co/godajaxox/99Thgic/goofball_goals_soccer_game_3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408177/normal_6067159346a27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417306/normal_6027f61c03504.pdfIn PDF document text
    • http://novoruxove.iblogger.org/accounting_concepts_and_conventions_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tugojan.rf.gd/13253637991.pdfIn PDF document text
    • http://goguvero.epizy.com/how_to_find_food_calories_per_gram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1fb5bd6-f37b-469e-807f-109c241a68b8/does_failing_a_pre_employment_dot_drug_test_go_on_your_record.pdfIn PDF document text
    • http://masekafisixovok.epizy.com/cessna_citation_cj4_performance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3a6a935-11a6-484e-8cc4-ed9cb8888258/how_to_run_python_project_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c4a3c12-c468-414c-99a6-a39129f282c6/19370311606.pdfIn PDF document text
    • http://zuniguvip.epizy.com/rimixusejaxizekofo.pdfIn PDF document text
    • http://tofirutu.rf.gd/raxepura.pdfIn PDF document text
    • http://lazuletezofik.onlinewebshop.net/calibration_manual.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_off0001170a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1170A 6004 bytes
SHA-256: 7c161e67217280fa88e405465a28ef458b9d319129341e1bfc308aaaf2bb28df
font_01_sfnt_off00012b82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B82 12120 bytes
SHA-256: aa151880ac102df941c40eff76b7e3858dcf3d57439da5af65d9452ea24d3bb0

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