Malicious PDF — malware analysis report

Static analysis result for SHA-256 ded0ea0348123599…

MALICIOUS

PDF

96.4 KB Created: 2021-07-31 11:15:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3a8f3268468098d7b5ba2fb4969bf9c3 SHA-1: 176718e499e3c8d3f6baf95e40c7aca449f511e0 SHA-256: ded0ea034812359927eff7eb07b1cec3c911a1c8b3bcedcde9fbe4ab57720170
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and URL analysis point to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/17c42ce02ef6e91faa6c095edea1a658/jenirawetosaruzozeto.pdf
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/a1414396a86116bca1645008e214cc15/36561556460.pdf
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160e4df043a82b---muwiranixekoginujagoj.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/4322fb7e40ed350baebae04249e34b6f/bexuxitagizewoginileboxom.pdf
    • https://twr1115.net/files/fckeditor/file/66459692194.pdf
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d4ff6ee4bed---71424813848.pdf
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/9q4oj2jfvospg1dhkit59gckqi/tuvaluvumavinojoxulo.pdf
    • http://hvpeds.com/upload/contents/file/27964999244.pdf
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a01945c33b3---81695667610.pdf
    • http://nextgt.eu/uploads/file/sefuvigozisatu.pdf
    • http://ruegen-ferienhaus-schneider.de/userfiles/file/luzawe.pdf
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/9f5f56afcc2915b11892407429ac5f65/dizolemerivabebebose.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c87ad6ca876---98921720562.pdf
    • http://anhuizhkj.com/upload_fck/file/2021-7-17/20210717230643201708.pdf
    • http://sanarina.de/ckfinder/userfiles/files/30693371539.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160dd9dd93e7ad---12575533778.pdf
    • http://puzynowska-kancelaria.com/userfiles/file/31523934342.pdf
    • http://aelma.com/sites/default/userfiles/file/23779128707.pdf
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/2bb70f93d11350683eaa0e96bb1fa427/vunurupuxobadafazixenika.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088d059de445---nifivamosax.pdf
    • http://cesishotel.lv/res/wysiwyg/file/lidinane.pdf
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/795f969bb76c515fefadce3514027a5a/lumif.pdf
    • http://diamond6ranch.com/userfiles/file/22605888966.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=what+is+the+constant+r+value+in+pv%3Dnrt
    • 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_off00011272.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11272 16792 bytes
font_01_sfnt_off00012a84.bin
0aa701c4ab32199c90761dd29f0633f313b188aa61eb532ae66830525ad8e7f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A84 18088 bytes
font_02_sfnt_off00015a80.bin
6d60b41d1512ad1cbdef2cf5f99b1486e3316e8e767a8531186b331cbcd09f9f
pdf-font-stream PDF embedded font (sfnt) at offset 0x15A80 10676 bytes