Malicious PDF — malware analysis report

Static analysis result for SHA-256 550eb83a420de9bc…

MALICIOUS

PDF

69.8 KB Created: 2021-06-05 07:34:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 930188ea962b04988013341bcb9e0e28 SHA-1: 5dead9987f850b1f74710d2aced58bddbac63dbf SHA-256: 550eb83a420de9bca02367c1f4800d62d628cc590e700194331cf1bdb87a3168
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan by ClamAV. It functions as a link farm, containing numerous external URLs, with one prominent URL being 'https://pistant.ru/pbw?utm_term=the+day+after+tomorrow+telugu+dubbed+full+movie+download'. The document's structure and the presence of many links suggest an attempt to lure users to malicious websites, likely for phishing or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • 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
  • 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://pistant.ru/pbw?utm_term=the+day+after+tomorrow+telugu+dubbed+full+movie+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403417/normal_602a40b79e733.pdfIn PDF document text
    • https://tusutaxuwipafu.weebly.com/uploads/1/3/4/4/134403355/nanazuj-tebagufovaje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365539/normal_60339d294c1bc.pdfIn PDF document text
    • https://luludexo.weebly.com/uploads/1/3/5/3/135322363/wokexekim-labujizujefarip-powuxuze-manibaduziv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477626/normal_5fcacca78182b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382620/normal_5fee2cef265b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530868/normal_604e640a27d9b.pdfIn PDF document text
    • https://jidisozipu.weebly.com/uploads/1/3/4/4/134440811/1785562.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484806/normal_5fd2a9cf2017e.pdfIn PDF document text
    • https://sixevajerav.weebly.com/uploads/1/3/5/3/135341720/cd0f35cb894.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458148/normal_605b550f7908f.pdfIn PDF document text
    • https://wuwobetag.weebly.com/uploads/1/3/4/7/134705291/8284033.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/5ab74897-d642-49ed-84bc-e07a89abc250/how_to_seal_sealant_tube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bc15c1d-2039-43e2-8d52-3c320050ec93/optiplex_gx620_motherboard_upgrade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/519d342e-cddf-45bc-84bb-6b0ae7d3e3da/about_face_4_alan_cooper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8b84926-75d2-482d-8024-0c34c24e1def/how_to_unmarry_cobb_accessport_v2_without_car.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14bda108-8985-4932-b42f-f2d07caeb1fd/86571388763.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f0ad5fc-7b35-4ccf-9b4d-2c99b057e23e/17625948970.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bd35193-8bf5-40fb-b3b0-6d03d4b8fedf/raratepodo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e903de91-3897-4061-9db1-7f0bc26cb76d/how_to_use_a_tork_timer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48624c3d-6a22-4326-940f-25c0a05c5396/how_fast_upload_speed_do_i_need_for_zoom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cd0c60b-c631-466f-956f-7f9a84e44c39/40510741570.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d03bc74-e02c-4e56-a045-938ec8aca605/how_to_write_a_descriptive_story_ks2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6104112a-4c22-4910-b8b9-677bb979ebd6/togos.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_off0000d195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD195 5488 bytes
SHA-256: e743052f7be76396b2ab09ab90922f1cff2949055d7dc77514844f07e424e573
font_01_sfnt_off0000e433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE433 10752 bytes
SHA-256: d3429c1ebe5bdd8cf179df9bea1b385fad09af73ac3be21acf531c152a026320

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