Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb9ce2e7b27fba83…

MALICIOUS

PDF

62.5 KB Created: 2021-01-25 20:02:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 5b53721376f0ec8df5d4fc51606bbd96 SHA-1: cacc921c276a46aa21cb31a3ab727e1016cb0e2e SHA-256: bb9ce2e7b27fba83877a94aad428e0717fb189fb237a1a25aa463cf9b1942ce5
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, suggesting it is part of a link farm designed to redirect users to potentially malicious websites. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf' and a date, but no clear textual lure. The presence of numerous external URLs, including those pointing to PDF files, strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • 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://trafftec.ru/123?utm_term=the+giver+review+questions+pdf PDF link annotation
    • https://cdn.sqhk.co/fusunusol/bjb5JYq/79915217517.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489969/normal_5ff26f6b5657c.pdfIn PDF document text
    • https://cdn.sqhk.co/xomorenut/gdFjeib/2713131205.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379236/normal_60000bf8b0b52.pdfIn PDF document text
    • http://physcoo.com/videos_engracados_para_whatsapp_downloadh3qob.pdfIn PDF document text
    • https://rawowoxok.weebly.com/uploads/1/3/4/3/134309987/6011881.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459182/normal_5fcc927a9b070.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408004/normal_5fc5e9da705cf.pdfIn PDF document text
    • https://lunafegosewexik.weebly.com/uploads/1/3/5/3/135351611/vuzezo_tolefigiwafona.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467936/normal_5fd10db6a53a8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414500/normal_5fe28a9a046cf.pdfIn PDF document text
    • http://storezone.info/call_of_duty_warzone_bunker_code_prisonxta4i.pdfIn PDF document text
    • https://zonanasuwovu.weebly.com/uploads/1/3/2/6/132683154/6756655.pdfIn PDF document text
    • http://sayfelengs.space/piano_tiles_game_downloadt9umm.pdfIn PDF document text
    • https://cdn.sqhk.co/ropobemuma/ifHujdK/hockey_manager_game_iphone.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403119/normal_5ff993bc78ba0.pdfIn PDF document text
    • http://kudretbozaci.com/pilot_royale_hackd7jij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465398/normal_5fdaed0151990.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501484/normal_5ff0a381581d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403410/normal_5fcced4a46119.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402963/normal_5ff9e4ccc767f.pdfIn PDF document text
    • https://cdn.sqhk.co/jedugifaxido/nOghNge/kuvadirarunem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000b963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB963 5288 bytes
SHA-256: 402ce97faf2df09235edba6d816c93685275b7a38d84d63527a6119c680b0c23
font_01_sfnt_off0000cb70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB70 9744 bytes
SHA-256: 67a46d8fc42920836424b744f657c58aea9c9052188bf36377fc7dfe1bb99400

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