Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8492c6e3c93ed6e…

MALICIOUS

PDF

71.7 KB Created: 2021-02-14 09:41:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e7d076ee1f377d372473b9226c6ced6c SHA-1: b5120f83f4d7e92714f419bfefafca7a88058ce2 SHA-256: d8492c6e3c93ed6e60a0a1655fb73f71b84f15a8df6526cba87f71ea69cd2c0f
146 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier. It contains numerous embedded URLs pointing to various domains, suggesting a phishing or malware distribution attempt. The 'SE_CALLBACK_LURE' heuristic indicates the document may be designed to trick users into calling a fraudulent support number.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://baarspo.ru/wix?keyword=wisconsin+natural+resources PDF link annotation
    • https://cdn.sqhk.co/semegopo/oCdjgjj/drive_trick_the_police.pdfIn PDF document text
    • https://metenesepagozo.weebly.com/uploads/1/3/4/7/134710396/264abb547.pdfIn PDF document text
    • https://cdn.sqhk.co/zenetofuma/fjhjheL/paycell_haz_r_limiti_kullanam_yorum.pdfIn PDF document text
    • https://cdn.sqhk.co/mojikeke/XvG0WYu/66970916483.pdfIn PDF document text
    • https://cdn.sqhk.co/pelotuwew/OMgdGj0/all_stars_cricket_refund.pdfIn PDF document text
    • http://desepevadijowu.22web.org/hastelloy_x_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/mijajijem/jhe3jam/65144853427.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404490/normal_5fe5d02a50684.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382639/normal_602212fc3337d.pdfIn PDF document text
    • http://sanejuvarasukip.iblogger.org/syllabication_worksheets_with_answer_key.pdfIn PDF document text
    • https://cdn.sqhk.co/mezugifosa/hje0KfL/tedulidavumod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376359/normal_600be4201ea28.pdfIn PDF document text
    • https://jowetirepenu.weebly.com/uploads/1/3/1/3/131383619/nifob.pdfIn PDF document text
    • http://ketorebagibof.22web.org/ffrk_anima_lens_spreadsheet.pdfIn PDF document text
    • https://cdn.sqhk.co/nivurerazusa/pieid6k/nitejibojulukoku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vudatuvabejosix.epizy.com/depupalimuritazudu.pdfIn PDF document text
    • http://musolag.rf.gd/picsart_free_for_pc_window_7.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_off0000db57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB57 4804 bytes
SHA-256: 1c112580c1bb30fcbd38425c2ebdbf0d3585cdb9394f73a7e69f549f73da2be1
font_01_sfnt_off0000ebca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCA 11212 bytes
SHA-256: 78a0e759b0983e9011d23b00b178d74c6588042e15160c5626e71b1a2db96517

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