Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ada12542670b125…

MALICIOUS

PDF

74.4 KB Created: 2021-03-27 11:19:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c917ba17abb299d03391356c8f0b92c2 SHA-1: 122e45d4954dfb1d01f005faa233fde26cd49336 SHA-256: 1ada12542670b125601be3e9e8cd1f158fd0c861317e86f84981e31170e811dd
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File T1059.007 JavaScript

This PDF document is flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's content likely tricks the user into installing a malicious browser extension or update. The embedded URLs, such as 'https://crophysi.ru/123?utm_term=fb+video+er+app+for+iphone', are part of this social engineering attempt to compromise the user's system.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/123?utm_term=fb+video+er+app+for+iphone In PDF document text
    • http://mitutepoka.medianewsonline.com/washing_machine_repair_shop_near_me.pdfIn PDF document text
    • http://kugewezebuvigiw.mygamesonline.org/xevejopetetifizojabemidem.pdfIn PDF document text
    • http://zufabud.22web.org/nekonakikavim.pdfIn PDF document text
    • https://moxalabukeziro.weebly.com/uploads/1/3/4/7/134772199/fapuwitokatofedileb.pdfIn PDF document text
    • http://jofipifemu.medianewsonline.com/best_reader_app_for_windows_10.pdfIn PDF document text
    • http://satumatajug.iblogger.org/96252283467.pdfIn PDF document text
    • https://majijajivetik.weebly.com/uploads/1/3/4/2/134265766/1223083.pdfIn PDF document text
    • https://teligodinawam.weebly.com/uploads/1/3/4/4/134457670/rokewo.pdfIn PDF document text
    • https://gunobapeve.weebly.com/uploads/1/3/4/7/134706327/8326245.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sikadakomog.epizy.com/evocative_objects.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/tennis_live_betting_guide.pdfIn PDF document text
    • http://zumoriko.epizy.com/gender_essentialism_theory.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/master_forge_charcoal_grill.pdfIn PDF document text
    • http://ramenejepom.rf.gd/the_testaments_atwood.pdfIn PDF document text
    • http://vimadetuvawese.rf.gd/gmail_for_android_4._2._2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9a5d7e2-2365-406d-a316-360a7ea20109/97136681216.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a27be446-2095-42c6-b05c-79f3d35e15d4/60222544180.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/igcse_cambridge_computer_science_workbook_answers.pdfIn PDF document text
    • http://zibemusisuvimal.rf.gd/51071453412.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_off0000e59a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE59A 5076 bytes
SHA-256: f9e9be7d20e6db1f3c28cf5c459534764351f32d6348e4ae526fd88943410d78
font_01_sfnt_off0000f6dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DD 11072 bytes
SHA-256: 4b4161febd6f92484a6dbda8738fb971157179b1da8d3d7ba6813cf637c3bb30