Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfbbe9d9689348d9…

MALICIOUS

PDF

95.0 KB Created: 2021-06-27 03:07:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1ea4d39d837240ed3978cb8f171f3495 SHA-1: 5ecadd89d6561d6c34efd21f27be1055c4e52bea SHA-256: dfbbe9d9689348d9ccf6cce4b2577731357ab04b24e3e453755405a2206d3120
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristically identified malicious link pointing to a suspicious URL, which is a strong indicator of phishing or malware distribution. The ML classifier and ClamAV detection further support its malicious nature. While no scripts were explicitly extracted, the presence of external URIs and the overall detection suggest the PDF is designed to redirect users to a malicious site, likely to download a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://amatnieks.lv/pictures/image/37232256650.pdf
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071508429052---50378423989.pdf
    • https://mytopics.it/uploads/file/murazaxaled.pdf
    • http://dyglas.com/userData/board/file/86140279939.pdf
    • https://golf-tout-terrain.com/publish/page/file/kujamerobuwenefegivabuba.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160880382a66b8---79930778157.pdf
    • http://firmen-bekleidung.at/userfiles/file/56038847216.pdf
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/16083b6233a336---30977135965.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/b520rl97valc6cg4g5ehcp0fl2/42566380034.pdf
    • http://domainecomps.com/documents/files/88719183666.pdf
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160996c1182fb5---97047575194.pdf
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/81ff56af24e10ffedb536cae913e3260/pesakarawurowamitevo.pdf
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083cd57937a9---29837782304.pdf
    • http://copy2d.com/ftp/image/file/bezakezidowulat.pdf
    • http://beveragesgs.com/userfiles/file/195256253.pdf
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087976bf348a---lunuwobatosolazap.pdf
    • http://myredm.ru/uploads/file/sixitub.pdf
    • https://vandolderskb.com/images/usr/32975364951.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac961ea78cf---motubawiloxob.pdf
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/686bb2679cbf466628bcca7d1ee91226/26733701255.pdf
    • http://zge-led.com/luodan/images/userfiles/file/lemaliropetenepamige.pdf
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077bef5ecba3---bamazoguvixefizavexoraj.pdf
    • http://s8radziejowice-paszkow.pl/userfiles/file/81189258833.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=reflections+practice+worksheet+answers
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c66.bin
f422e0161dcdcb199062cb56240c87bcc0f2b20278b4dc3029b5b07bb6efc222		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C66 10800 bytes
font_01_sfnt_off00012552.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12552 16792 bytes
font_02_sfnt_off00013d64.bin
7effe23f0f40a6ef2f2df81d47561453047c218eae1587e9c95cf0d9fe9abf0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D64 18516 bytes

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