Malicious PDF — malware analysis report

Static analysis result for SHA-256 07389500ddb5729e…

MALICIOUS

PDF

94.4 KB Created: 2021-07-06 22:07:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ee4f83adc7a0ca3669a31da2f09c2c51 SHA-1: de3b3216f776333d2b3ac721c4194dca41765885 SHA-256: 07389500ddb5729e59b86f30e2ad76083fa41d2b446781fdd56f6673d5aedcef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farm patterns, indicating a likely phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to compromised or malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9786

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://smidgel.ru/uplcv?utm_term=angular+material+dashboard+template+free+download
    • http://mid-europe-ex.com/images/blog//file/dapewumezodamumebofeziz.pdf
    • http://zonazero.es/userfiles/file/75901051792.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608cee79ebc12---62084666794.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bb7206614e3---nulawuvesa.pdf
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc8c9d754d---kaxag.pdf
    • https://towa-aaa.jp/userfiles/file/44141407181.pdf
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/16090a0bc8f63e---67698704588.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ea9928ba3---wigejumobu.pdf
    • http://ahchala.com/img/file/44090566922.pdf
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c12fce4b708---24408500783.pdf
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf15793aa4---lawenozuludibu.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa56971a22---3087067601.pdf
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/e302dab75b0059d8ce6f70765a6b5524/pajidoferova.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc792e6afa9---29978790936.pdf
    • https://mangonebike.com/uploads/file/xonajodi.pdf
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/47973f4985460d7ab4adaccd0f917f8f/918625637.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f66fab009f---kavixebinewufo.pdf
    • https://karinbentum.nl/uploads/file/99055936179.pdf
    • http://pallenberg-busreisen.de/uploads/files/lovutul.pdf
    • http://fine-cottage.ru/userfiles/file/fewul.pdf
    • https://canevastoilestjean.com/upload/editor/file/dikazokagumudelinepi.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/10a36ef607f4b88ba9e608e3eac95e44/1757341733.pdf
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/45beeeab2fe6595ab54c2c41162f2c29/gujawojubivitiwesava.pdf
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160835b1bed626---73353404557.pdf
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/ug29rc9ubgg76js0aguj7gne1s/90852399951.pdf
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/e9af40187ebe79866e51595b14c1a6a3/366871734.pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3f3.bin
901e939d9ea963101fbbedbc220b3d8f22debdcc3961be920192fe94a318327c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F3 17740 bytes
font_01_sfnt_off000122b1.bin
2694685e0a3d01474ebfbe9a69fcb730e16ecfa8437edec3e6222e80f3f0044f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122B1 11252 bytes
font_02_sfnt_off00013c87.bin
25b9c34b44ea6f8dffb183aedeeba05c5cf292536b51eb25ccbdb9c4140b58a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C87 16448 bytes
font_03_sfnt_off0001531b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1531B 16792 bytes

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