Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ee4482d1cde2340…

MALICIOUS

PDF

75.4 KB Created: 2021-04-23 19:07:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d69e092fd261d46f98e857565653fb86 SHA-1: c94de281284d71f056481482cc9dfa337a355ad9 SHA-256: 4ee4482d1cde23401edefc437522f56fdb07273d6e134ba49e13a0ed9ce17fb0
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The 'SE_CALLBACK_LURE' heuristic strongly suggests a callback phishing or tech-support scam, where the user is prompted to call a phone number. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards the exploitation of PDF vulnerabilities to deliver a malicious payload, likely involving a second-stage download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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://kuzutuzo.ru/strik?utm_term=us+navy+neck+gaiter
    • http://lubevos.scienceontheweb.net/66962423445.pdf
    • http://mazipuvaxa.mywebcommunity.org/induction_motor_control_design.pdf
    • https://cdn.sqhk.co/videgogaf/BieKgUg/planet_mars_3d_map.pdf
    • https://cdn.sqhk.co/vulovosovem/jjzYnha/49747316498.pdf
    • https://cdn.sqhk.co/gomiwopizi/h6cjhE9/73088427275.pdf
    • http://nakidki-alkantara.xyz/88649250643x76sq.pdf
    • https://cdn.sqhk.co/fifibaje/9LjhAjd/low_income_housing_tax_credit_program_guidelines.pdf
    • https://cdn.sqhk.co/fovomesit/cNjjhjB/free_download_3d_live_wallpapers_for_laptop.pdf
    • http://duwelizub.mywebcommunity.org/dodajiwov.pdf
    • https://static.s123-cdn-static.com/uploads/4385228/normal_5fcf46587a388.pdf
    • https://cdn-cms.f-static.net/uploads/4465924/normal_6059b9b14e026.pdf
    • https://cdn-cms.f-static.net/uploads/4487641/normal_6046b764ace5a.pdf
    • https://cdn-cms.f-static.net/uploads/4465025/normal_6020722082e11.pdf
    • https://cdn-cms.f-static.net/uploads/4489969/normal_601cefecb8382.pdf
    • https://cdn.sqhk.co/lodoseduler/jheijgg/debilevodine.pdf
    • https://cdn-cms.f-static.net/uploads/4416322/normal_6047bb22b9784.pdf
    • https://cdn.sqhk.co/nupepewomaxu/gg7eNhc/33086944222.pdf
    • https://static.s123-cdn-static.com/uploads/4461234/normal_6006885ac1e87.pdf
    • https://cdn.sqhk.co/fudikuzi/iibfIhi/15942123801.pdf
    • http://se-mrush.com/fidget_spinner_neon_glow_game50bob.pdf
    • https://cdn-cms.f-static.net/uploads/4493888/normal_5fd36af88c5ba.pdf
    • https://cdn-cms.f-static.net/uploads/4421209/normal_60463ab5455c1.pdf
    • https://cdn.sqhk.co/bemovunilupo/hdxaDgf/subaworowokulaneso.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nekelaxowe.atwebpages.com/abs_workout_home.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7a9.bin
68adfc636c47c28589b0a49a9c1b965901e5614e4502985fb8c1753dfb68a3bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A9 5152 bytes
font_01_sfnt_off0000f959.bin
0b938bbf58d3b0f31c14bdef961ad0c6a720f8d149ece08b320a0a67fa7f6976		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF959 10988 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.