Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf756246792d875b…

MALICIOUS

PDF

82.5 KB Created: 2021-02-22 08:58:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 3f8a34b78779ff787fc708a3d91798f1 SHA-1: bb6bba5285240dfe422add3c078efe0ffdb10a6c SHA-256: cf756246792d875b9ca0da38b5b0ea7445e0e7e7c36032f07fe207b7017ee1eb
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is a common tactic for phishing and malware distribution. The embedded URL is likely intended to lead the user to a fraudulent site or to download a secondary payload. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/123?utm_term=can+i+day+trade+on+coinbase+pro In PDF document text
    • https://cdn-cms.f-static.net/uploads/4426832/normal_602eeef816f50.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456685/normal_5ff5862378da0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381756/normal_5fe12dcfcdef4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408478/normal_601e5e3b272ff.pdfIn PDF document text
    • https://wipukanutunuk.weebly.com/uploads/1/3/1/4/131437017/parazamiraweg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469103/normal_5feb3b6e60710.pdfIn PDF document text
    • https://cdn.sqhk.co/wotutovebo/9hhwRhg/luxedumezela.pdfIn PDF document text
    • https://cdn.sqhk.co/wofunukasu/LlP5jbk/35352115813.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482206/normal_5ffef2791d25b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484126/normal_60289bd928e53.pdfIn PDF document text
    • https://cdn.sqhk.co/mixaluwekitu/e51Eifx/36352241166.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475392/normal_60185d6f77302.pdfIn PDF document text
    • https://cdn.sqhk.co/rigizisojix/Qibhdhe/chickens_that_lay_pink_eggs_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/xolokenuw/1wsjcYU/my_block_wash_park_prices.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/chupke_chupke_full_film.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/android_vs_ios_2018_users.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/gta_cheat_codes_apk.pdfIn PDF document text
    • http://wewozewifepono.epizy.com/18717133010.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/60091487551.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_off00010660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10660 5180 bytes
SHA-256: a3166d71d4f0addc1fd6eeb895e0315e9e2a212bdb82f573199206c0fb8583aa
font_01_sfnt_off0001180f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1180F 10764 bytes
SHA-256: 4ebe84df54ce0c19bbcf8b5369ca63ebee2e3b0c8cd845c4101f17b5ac14566a

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