Malicious PDF — malware analysis report

Static analysis result for SHA-256 faa1da02836c8e74…

MALICIOUS

PDF

73.4 KB Created: 2020-12-26 11:19:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0bbbca516556e988ce0c83def2d8151b SHA-1: 7966a04fd03582f4ce9693632b22a9a9af182c03 SHA-256: faa1da02836c8e7459b9a57d83d877914ec470ad075d5a6e8fa48822bc8639e7
196 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing or malicious lure, indicated by the 'Fake CAPTCHA' heuristic and the presence of numerous external links, some pointing to potentially malicious domains. The ClamAV detection and ML classifier further support its malicious nature. The document likely aims to deceive users into interacting with a fake verification prompt, potentially leading to the download or execution of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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://traffine.ru/strik?utm_term=i+am+monster+idle+destruction+hack
    • https://tosufiriro.weebly.com/uploads/1/3/4/4/134472590/30a989a530c.pdf
    • https://static.s123-cdn-static.com/uploads/4412161/normal_5fc5335fd9540.pdf
    • https://verosogoteri.weebly.com/uploads/1/3/4/7/134738646/7431146.pdf
    • https://kikuvabafot.weebly.com/uploads/1/3/4/3/134332304/mekanepaje.pdf
    • https://dikajumexuw.weebly.com/uploads/1/3/4/3/134324924/850efbc06e.pdf
    • https://mesenogixu.weebly.com/uploads/1/3/4/7/134736765/wukir-tinerofabubuju.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kakekojezutok/36113652419.pdf
    • https://uploads.strikinglycdn.com/files/6ecfbc2c-0834-4945-82ad-f7fa54ada942/hand_sanitizer_formulation.pdf
    • https://uploads.strikinglycdn.com/files/65ade999-b203-44d3-8dac-90098544ead5/man_and_his_symbols_quotes.pdf
    • https://uploads.strikinglycdn.com/files/9744d73b-2688-422e-b7b5-010f41c0dea7/12151692915.pdf
    • https://s3.amazonaws.com/kavitokolezub/mubodefabomunuvegigo.pdf
    • https://uploads.strikinglycdn.com/files/7dd826a4-984a-4fd4-865e-9e82487d8c31/brs_pharmacology_drive.pdf
    • https://uploads.strikinglycdn.com/files/3d9a8330-ab78-4e18-b4f4-a4f540470fda/72621707599.pdf
    • https://uploads.strikinglycdn.com/files/62f75d75-0d98-4131-a747-b7e69b24253d/watch_malayalam_movies_online_2019.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_off0000ddaf.bin
2b659070a0ee7111ea991a3b7d586ebe3d5a6a3092090ef0ccfb6a5433a7c232		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAF 5180 bytes
font_01_sfnt_off0000ef1c.bin
6aa722a2f7e9b26cbefda6d6ac5b2ed85269fc5894037883adaaef03702f7c09		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1C 12384 bytes

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