Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed2c5cf6ccded190…

MALICIOUS

PDF

82.6 KB Created: 2021-09-13 18:57:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2288276f3b3728c03105e90287c007dd SHA-1: e45b2ce7e6ec2600de10c67f6e8ba4ab2284805b SHA-256: ed2c5cf6ccded190d3ba49df146d7eb308c7eb7bcd270ff29d2b985b0023e6da
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript is likely used to facilitate the download or redirection to a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://digjamaica.com/app/webroot/files/60368605007.pdf
    • http://pietrek.com/MARCUS/files/file/30979449289.pdf
    • https://aradovan.com/userfiles/file/rofokelilobipogatetowured.pdf
    • https://flavio-tonon.it/public/file/88133189341.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/3b1gmv89ppoq8b5c12ahu798q1/faferiwuvowesid.pdf
    • http://land89.com/ckupload/files/bekirafegeloki.pdf
    • https://fleseriuassociates.ro/files/file/63602628054.pdf
    • http://csc0311.com/userfiles/file/20210906005034_m61g1x.pdf
    • https://agronlogistics.com/userfiles/files/mikapozexipabagonepatik.pdf
    • http://traiteurluc.com/userfiles/file/zigelopuwodumaro.pdf
    • http://sfipl.in/userfiles/file/kujimoretagon.pdf
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef25ed6494---55081529135.pdf
    • https://vilnius.cvzona.lt/resources/img/files/duboxufiw.pdf
    • http://garage-fuji.jp/js/upload/files/79019997275.pdf
    • http://winterwonderlandzundert.nl/uploadimages/files/13337565740.pdf
    • https://mackbeks.com/files/file/50670904527.pdf
    • http://safetruck.gr/images/file/54869997371.pdf
    • https://classconnbio.com/img-jacson/files/54763745769.pdf
    • http://herningbadintra.dk/app/webroot/upload/files/5079982581.pdf
    • http://talleresjpg.es/img/file/82746904313.pdf
    • https://leganordavigliana.it/uploads/file/18660926169.pdf
    • http://gzsjlt.cn/userfiles/file/92894101821.pdf
    • http://www.kowel.com/ckfinder/userfiles/files/1630937494.pdf
    • http://studiosantomauro.it/userfiles/files/sajagederese.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=minecraft+on+mobile+phone
    • 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_off0000ddfb.bin
abe0376a283d9e4271bd1368995c1a3616320e13b7988e1ebf0adcb9f6b4d439		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDFB 18148 bytes
font_01_sfnt_off00010c99.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C99 16792 bytes
font_02_sfnt_off000124b0.bin
7a8a72043af21d9f988d7b385c2e15354eb585303b09d9be3d1bb643e11935ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124B0 10708 bytes

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