Malicious PDF — malware analysis report

Static analysis result for SHA-256 741606d295491db5…

MALICIOUS

PDF

75.6 KB Created: 2021-03-07 01:47:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 8c5b40d4fb18f4f2e3f0dc00752ca813 SHA-1: e249dd1bca828e13ec31f2c782baf5f0c1d5c1cf SHA-256: 741606d295491db536866960554476d4a5e5536b08fd25194e8a922f235e5ba7
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains numerous embedded links pointing to disposable domains and known redirector infrastructure, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'amway commission', indicating a potential lure for users interested in financial or business topics.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=how+to+calculate+amway+commission In PDF document text
    • https://cdn-cms.f-static.net/uploads/4404741/normal_6022d0d4883dc.pdfIn PDF document text
    • http://nobirejajatit.iblogger.org/winter_worksheets_for_preschool.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426279/normal_5fd664c2f28cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415783/normal_6004f67283491.pdfIn PDF document text
    • https://cdn.sqhk.co/neviragar/fjjhaia/jutopuxifeva.pdfIn PDF document text
    • https://cdn.sqhk.co/xopuxuvop/3ifkPft/glitter_wallpaper_iphone_tumblr.pdfIn PDF document text
    • https://nanavefog.weebly.com/uploads/1/3/0/7/130775134/xolipilalefeduso.pdfIn PDF document text
    • http://kevufeduwatawos.mypressonline.com/deadpool_vol_1.pdfIn PDF document text
    • https://lamosafobe.weebly.com/uploads/1/3/5/3/135322951/4362531.pdfIn PDF document text
    • http://wazixusazajafem.22web.org/reporting_of_hsn_code_in_gstr_9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421354/normal_600e51a7ba030.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368954/normal_5fe02a68e78ef.pdfIn PDF document text
    • https://cdn.sqhk.co/dasewugiru/Z0Xjhhi/dozarowiropikinufijije.pdfIn PDF document text
    • https://cdn.sqhk.co/jivaduzar/jaicij6/boom_boom_pow_kidz_bop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495254/normal_5feb4c3e71620.pdfIn PDF document text
    • http://larokamexi.sportsontheweb.net/mubil.pdfIn PDF document text
    • https://cdn.sqhk.co/tagorotage/dhfjdic/kapal.pdfIn PDF document text
    • https://sanijala.weebly.com/uploads/1/3/4/8/134889677/tatow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://birotizedu.epizy.com/32125220649.pdfIn PDF document text
    • http://lowavizoviwu.epizy.com/sadodiva.pdfIn PDF document text
    • http://makibiwediwanov.rf.gd/24715302875.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_off0000ea5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5B 5004 bytes
SHA-256: 09249f9bf8449f6241a83ac4edf3d03b5dc9349e5f96438c12e863a351d6857c
font_01_sfnt_off0000fb64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB64 11384 bytes
SHA-256: bb3db03cac1a2d04e674c05ac0fe3a7cd2717db8ccbc4163bc9e7c16b70300d2

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