Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7d084ef2d9f8bc9…

MALICIOUS

PDF

71.9 KB Created: 2021-06-01 03:54:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4300a48007d4cf5bfbd1f48e6de6eb19 SHA-1: 0803cf966511f7f2758cdf9155e66b8659f335e0 SHA-256: e7d084ef2d9f8bc9396b92a58fe9ffdfd3ff434c47b5c73e6dcae2f9bf1c0fd7
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical detection for a link farm and a high ML score. The document contains numerous external links, suggesting a phishing or SEO manipulation attempt. The presence of embedded URLs and the overall structure indicate it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9665

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • 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://archism.ru/pbw?utm_term=who+is+the+richest+igbo+man+in+nigeria+now
    • https://fajuvupo.weebly.com/uploads/1/3/5/3/135310445/zojekoputal.pdf
    • https://kixovojowabib.weebly.com/uploads/1/3/5/9/135966002/77a67ae718a84fd.pdf
    • https://rewodudifizaba.weebly.com/uploads/1/3/4/4/134475466/4198042.pdf
    • https://tidurikax.weebly.com/uploads/1/3/1/8/131856133/vupiwibive_dobozakovenop.pdf
    • https://rijomedoniki.weebly.com/uploads/1/3/5/3/135399424/1792934.pdf
    • https://zisaneviz.weebly.com/uploads/1/3/4/3/134319132/gakekisu-tuvake-sotudojezulin-fonojiteku.pdf
    • https://sikapekit.weebly.com/uploads/1/3/5/3/135317012/bdccdc.pdf
    • https://lixabepona.weebly.com/uploads/1/3/4/5/134530066/3328907.pdf
    • https://suxewanevot.weebly.com/uploads/1/3/4/5/134595646/jenulonuw_jukulebozo_dagewinesowiwup.pdf
    • https://witowufagefalob.weebly.com/uploads/1/3/0/7/130738848/dimovowupebu-zegazedox-noges.pdf
    • https://nanavirirexam.weebly.com/uploads/1/3/4/4/134474519/653793.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sepaxebi.pbworks.com/w/file/fetch/144418728/how_do_i_install_mobdro_on_amazon_fire_stick.pdf
    • https://uploads.strikinglycdn.com/files/3353df05-36f7-4546-834f-c24fe21d5cde/camp_xcel_instagram.pdf
    • https://uploads.strikinglycdn.com/files/b27b7c9d-cf41-420a-8d13-13150b78acb9/xotokawusobazakubu.pdf
    • http://zepadatoju.pbworks.com/f/naravusojajekaj.pdf
    • http://jesababa.pbworks.com/f/96403593110.pdf
    • http://venatulafiz.pbworks.com/f/reading_comprehension_exercises_with_answers_for_grade_3.pdf
    • http://wuvebag.pbworks.com/f/55347915099.pdf
    • https://uploads.strikinglycdn.com/files/2da9fd29-e03f-48ea-9582-0d6871eca12e/lewanatatexakuxej.pdf
    • http://xojifot.pbworks.com/f/borg_warner_t5_fluid_capacity.pdf
    • http://mapijakemifo.pbworks.com/f/fundamentals_of_financial_accounting_5th_edition_phillips.pdf
    • http://fixiguru.pbworks.com/f/metodologia_de_la_investigacion_bernal.pdf
    • https://uploads.strikinglycdn.com/files/445c9fe0-f7e3-4729-8fb7-b94d833d22f0/bivoruparuledisazixufena.pdf
    • http://mibegenav.pbworks.com/w/file/fetch/144436872/sexutapemidexep.pdf
    • http://zogekinovag.pbworks.com/f/agneepath_full_movie_hd_1990_download.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f244.bin
488533d623175ae13a12106cda1c39fcbbfbb0314624c5d4a65ecf71a06868b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF244 5212 bytes

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