Malicious PDF — malware analysis report

Static analysis result for SHA-256 293deece6f1ae5e4…

MALICIOUS

PDF

74.7 KB Created: 2021-02-09 20:46:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 62450a43410e8c9ee219576b39e31e53 SHA-1: 6ab5f28eb34d7778da46878239aa1ada5cd37206 SHA-256: 293deece6f1ae5e458bd09e95ddfc001967203879bebe3155bf8f1c2378cf236
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a deceptive link farm. While no scripts were explicitly extracted, the nature of the embedded URLs suggests a phishing or redirection attack, likely intended to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://bologen.ru/wb?keyword=best%20free%20animated%20wallpaper%20for%20android PDF link annotation
    • http://apparentlyopt.com/lobunagitobikovekavitofoxw8q87.pdfIn PDF document text
    • https://zarixurumis.weebly.com/uploads/1/3/1/4/131406049/vagowijasejofulan.pdfIn PDF document text
    • http://mainsale.info/538065144055mytk.pdfIn PDF document text
    • https://cdn.sqhk.co/tomubozes/dzTAhhf/47454797919.pdfIn PDF document text
    • https://cdn.sqhk.co/gotubosif/ijjhDlg/didolenikijamegalabeva.pdfIn PDF document text
    • https://cdn.sqhk.co/lofakekaf/NgcgflR/zuduwe.pdfIn PDF document text
    • http://pogadai.xyz/logo_dls_2019_arema3yi65.pdfIn PDF document text
    • https://mumerigowijegap.weebly.com/uploads/1/3/4/7/134771458/kagizamagevid.pdfIn PDF document text
    • http://klyshsheff.xyz/the_book_of_yokaixvip7.pdfIn PDF document text
    • http://clebohets.xyz/daily_work_schedule_template_in_excelpckhw.pdfIn PDF document text
    • https://zobupasig.weebly.com/uploads/1/3/1/4/131438120/6633757.pdfIn PDF document text
    • https://felavutiz.weebly.com/uploads/1/3/1/1/131164211/kobelabi.pdfIn PDF document text
    • http://mestorating.ru/pubinipejeziguzirfs8u.pdfIn PDF document text
    • http://8gusevshop.space/poweraudio_pro_music_player_reviewi2ktk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/free_geometry_worksheets_1st_grade.pdfIn PDF document text
    • http://dinedolorexos.rf.gd/anil_s_ghost_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/facebook_messages_chrome.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_off0000e82e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82E 5328 bytes
SHA-256: 8af0da1ce3e83e1cdb77cc24ca296860703d4a2fa609ba70a587104cbbf5e7ba
font_01_sfnt_off0000fa4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA4D 10468 bytes
SHA-256: 5b6b1e25a5f7ad991ad7e6673420a679c67c5cc065f0fbac074eceee88bee80e

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