Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffbf2e433a714f44…

MALICIOUS

PDF

71.3 KB Created: 2021-03-05 09:23:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 39b659e0b999b3d29b58aac07cfc7c97 SHA-1: 4c50903672047ebb69cdc34af2dfed7e1c5527d6 SHA-256: ffbf2e433a714f446863e11993e403bb66b63cea28a90da2d586c5b8291a7ea0
164 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, and detected by ClamAV as Pdf.Phishing.Trojan. The presence of numerous external links, including one pointing to 'vilenefex.ru/strik', suggests a phishing or malicious redirection attempt. The document body, though heavily obfuscated, contains a reference to a URL that aligns with the heuristic findings.

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://vilenefex.ru/strik?utm_term=how+much+does+the+kakarot+dlc+cost PDF link annotation
    • https://woxopipuwesubaj.weebly.com/uploads/1/3/1/4/131453061/949408.pdfIn PDF document text
    • http://vatamulejuvovi.22web.org/pabapazegowowoluvo.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/hjXiiz3/best_lock_screen_password_android_device_manager.pdfIn PDF document text
    • https://kasewipiliri.weebly.com/uploads/1/3/4/9/134901701/c2f017.pdfIn PDF document text
    • https://cdn.sqhk.co/vilitemeru/fgdijVV/92268996421.pdfIn PDF document text
    • http://vaxiguna.iblogger.org/80959943692.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mutexuwe.epizy.com/kibefukexaxixomur.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/athalia_script_font_free.pdfIn PDF document text
    • http://kekosasokab.epizy.com/is_enthalpy_change_of_formation_exothermic_or_endothermic.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/119073581.pdfIn PDF document text
    • http://rawibejib.epizy.com/what_is_leap_year_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fba1c470-26fd-4854-a49c-059a1e882b20/para_leer_al_pato_donald_audiolibro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96ff7e52-0cb2-4447-a6be-aaeef0b14ad8/intelligence_report_example.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/rexamupomufitulukuw.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/program4pc_video_converter_pro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de01b02a-833a-4e09-bc02-9821637f538d/is_it_true_green_tea_burns_fat.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/72717571931.pdfIn PDF document text
    • http://beritoka.rf.gd/accounting_equation_exercises.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_off0000da95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA95 5296 bytes
SHA-256: 5a971e2fb079307ec3dae77ff36775bb46800ce2a5ea61e83b7f16046e6caec6
font_01_sfnt_off0000ec78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC78 10412 bytes
SHA-256: c311a86d949c6d08a1bdf626ff6a98038dd94487feeafd3594f9cd300f82d29e

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