Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2e5cd7dcaec1e0b…

MALICIOUS

PDF

73.7 KB Created: 2021-03-30 20:52:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 7e9bae1fe3ba1a97827563aafb4cdb99 SHA-1: 05f3d9c03272f40d57045d34b1a7df14728c8c99 SHA-256: f2e5cd7dcaec1e0b5abababcbd1c5bc3cc6c3d20f65c0847159575394115898a
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with a significant heuristic identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of external URIs and the nature of the heuristics suggest the document is designed to redirect users to potentially harmful sites.

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://pelibifir.ru/123?utm_term=board+of+directors+financial+reporting PDF link annotation
    • http://wetepuzasuvuroz.22web.org/jebotejiveminaxira.pdfIn PDF document text
    • https://cdn.sqhk.co/visobipibe/Vhdia9w/don_t_rush_slow_touch_grind_on_white.pdfIn PDF document text
    • https://cdn.sqhk.co/zowegifivufo/bZhhcia/28396449017.pdfIn PDF document text
    • https://cdn.sqhk.co/xiroxozalal/iKlhdHN/1st_birthday_cake_images_for_baby_boy.pdfIn PDF document text
    • https://cdn.sqhk.co/lojibuwe/ZibcJ2o/subaxewizafineboravuj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372735/normal_5ffe7ce9dbff6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452626/normal_60486b2f43c90.pdfIn PDF document text
    • http://foxinawolukomat.iblogger.org/73246979194.pdfIn PDF document text
    • https://cdn.sqhk.co/lizuxutagisu/fjdHYgc/bitopawumiwek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d15ccd60-250e-443c-84e2-85fc714ea74d/age_of_empires_2_cd_windows_10.pdfIn PDF document text
    • https://e0d0d77b-4c00-4265-bc22-f0cc5cf11ada.filesusr.com/ugd/957eb4_a508a1039e0b4f3d808a0a0a59d7bdf1.pdf?index=trueIn PDF document text
    • http://zivekano.epizy.com/penidasifokufinomasakinu.pdfIn PDF document text
    • https://627f215e-41ba-4aa4-9906-5f9f9d117739.filesusr.com/ugd/8ab72e_a3c1758df24a4bd4a245c986b11d4610.pdf?index=trueIn PDF document text
    • https://b6de9e3f-c562-4e05-b5ee-70895c8060ae.filesusr.com/ugd/3801ff_b14c79807f474242866e7cd59a442a7e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/580ce60c-fc0e-4f67-ac50-5c0507d14296/how_best_to_answer_tell_me_about_yourself_in_a_job_interview.pdfIn PDF document text
    • https://48e6b720-b653-4920-beb0-7ef171ab6ab9.filesusr.com/ugd/d9d1f5_6a8f5ec268f34364ba77473d0811ef1b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbec9219-b272-48ba-bd5b-14c23177ec69/cnn_live_update_on_us_presidential_election.pdfIn PDF document text
    • http://mikotavorekibe.rf.gd/76977122396.pdfIn PDF document text
    • https://6db1e9a2-4282-4636-8d41-de07325ad911.filesusr.com/ugd/d97b38_6ff1ad3cbe4b446691ec8540761ea6b0.pdf?index=trueIn PDF document text
    • http://bemurulorax.rf.gd/63862355222.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_off0000e426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE426 5372 bytes
SHA-256: 68137b74c86680a0521cf6f9cecdc93cb57f101d743ac8afca45ac40fb4128ef
font_01_sfnt_off0000f67f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67F 10340 bytes
SHA-256: 51070bdd1469473b98f3477ff1ad4e3acef82f5d2f36e51c728cba5919fd2737

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