Malicious PDF — malware analysis report

Static analysis result for SHA-256 f011ffc6aa609835…

MALICIOUS

PDF

73.6 KB Created: 2021-03-06 08:28:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e809bf114e39082e867a71b378c09c03 SHA-1: 4a98a995b12c050c774884595c279e9d43542888 SHA-256: f011ffc6aa60983586b96d97755133b10389dd7d30298137bd0be44f6c266b74
124 Risk Score

Malware Insights

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

This PDF document is classified as malicious and contains numerous embedded URLs, many of which point to disposable hosting or unknown domains, suggesting a phishing or link-farming scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed to host many links on potentially untrustworthy domains. The ML classifier and ClamAV detection further support its malicious nature, likely serving as a lure to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8924

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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/award?keyword=arduino+uno+pin+schematic PDF link annotation
    • http://towufato.mywebcommunity.org/how_to_operate_a_cnc_milling_machine.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504554/normal_5fd7886eb9426.pdfIn PDF document text
    • http://jafoxidulez.mypressonline.com/72665971786.pdfIn PDF document text
    • http://copyrightsupport-ig.com/63248031142tf6ko.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445736/normal_5ff75c28cf88a.pdfIn PDF document text
    • https://gilaxisob.weebly.com/uploads/1/3/1/4/131406303/8469be95b03.pdfIn PDF document text
    • http://top-agent.ru/bevizarigoludesako2ensq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496571/normal_5ffe4cd778350.pdfIn PDF document text
    • http://riniwodifole.medianewsonline.com/gujojumabojolopup.pdfIn PDF document text
    • https://fekamudubop.weebly.com/uploads/1/3/5/3/135325245/6239644.pdfIn PDF document text
    • http://vumonivaxozutod.mypressonline.com/77347351045.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ae5cfe7-6dc4-4775-9827-3980bf69e771/how_to_program_esp8266_without_arduino_ide.pdfIn PDF document text
    • http://gonegexunu.myartsonline.com/93913099450.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3d7630c-8456-41b9-9721-cca65981545e/night_owl_720p_hd_video_security_dvr.pdfIn PDF document text
    • http://gunexukod.epizy.com/multiplication_flash_cards_1-12.pdfIn PDF document text
    • http://salulasalanegox.rf.gd/besides_that_formal.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E6 5272 bytes
SHA-256: 73fbe77a8df8172ed08caa2d307b2d0c6c84a582878de473388bf60f51ae75ab