Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f3d425d620bacd9…

MALICIOUS

PDF

68.5 KB Created: 2021-03-02 11:24:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: eea4b23d0ae29cf0746406bec269fe14 SHA-1: 870dc5309cd6800129a08244c9d552985ae8f75d SHA-256: 9f3d425d620bacd92d3e9465731497da704e537a9236fa06f6a70ecb98a2579e
154 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, with a high ML score of 0.999790. Heuristics indicate it functions as a link farm and contains urgency lures, suggesting a phishing or scam attempt. The embedded URLs, such as https://xajibur.ru/wix?keyword=ticket+to+read+home, are likely used to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://xajibur.ru/wix?keyword=ticket+to+read+home PDF link annotation
    • http://feyakast.online/abcd_2_all_video_song_pagalworldhtiap.pdfIn PDF document text
    • http://lebedugipul.mywebcommunity.org/21121620947.pdfIn PDF document text
    • http://electorat.org/tavepuwamutogexubaby9hsz.pdfIn PDF document text
    • http://gudelew.mywebcommunity.org/8452918969.pdfIn PDF document text
    • http://zonerokemub.getenjoyment.net/schwinn_exercise_bike_270.pdfIn PDF document text
    • http://iuts.space/bikezegivudibikumizonxsgj.pdfIn PDF document text
    • http://idclick.cash/bexelinor9oa7.pdfIn PDF document text
    • http://tumuduwaju.mypressonline.com/smart_paint_repair_cost.pdfIn PDF document text
    • http://helpcenter.business/38124666487kr2w8.pdfIn PDF document text
    • https://revafabeku.weebly.com/uploads/1/3/4/7/134708131/ripipodizado.pdfIn PDF document text
    • http://rastet-malysh.ru/94088555646ey3rd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mukanebesiva.atwebpages.com/sales_manager_job_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/2019_tamilrockers_movie_hd_free.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/jazorut.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/sapinogelitugaxapikad.pdfIn PDF document text
    • http://xiwozoget.atwebpages.com/63815273254.pdfIn PDF document text
    • http://duxegejuw.atwebpages.com/73266113732.pdfIn PDF document text
    • http://gurabagoderes.atwebpages.com/vtech_cordless_dect_6.0_phone_4-pack_black_and_silver.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_off0000d0ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0AE 4980 bytes
SHA-256: 79881ad11cb61c04cbdb2d53e61bf144f2f992682ae4933820ce119441dc23b7
font_01_sfnt_off0000e174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE174 10448 bytes
SHA-256: 9cb5dcd3a92c42d8eacee2f8f98b93fc819143e8d06163ad58257bb70fabf65b

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