Malicious PDF — malware analysis report

Static analysis result for SHA-256 625fd88591511e6a…

MALICIOUS

PDF

73.3 KB Created: 2021-09-01 17:21:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3a05d9c5d86ba64cec52a69fab1cfc13 SHA-1: 0b32f3ebb08db7b67c3c40b9a847ffe05bee2a38 SHA-256: 625fd88591511e6aa7e0739f45799d52d49d4b2ebbe0156ba4caf38a5dca4f3d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content or phishing pages. The presence of embedded URLs and link farm heuristics strongly suggests the document's primary purpose is to facilitate access to external malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://oniceh.ru/uplcv?utm_term=point+of+articulation PDF link annotation
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/7a3a7cce23b927adb1bcab8cb6535548/92688259186.pdfIn PDF document text
    • http://canigrup.com/userfiles/file/livurax.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/16128d09d63e11---moxewojebuvudelibosij.pdfIn PDF document text
    • http://vertracapital.com/uploads/files/87415732790.pdfIn PDF document text
    • http://sns-russia.ru/userfiles/file/xozapokufeve.pdfIn PDF document text
    • https://hijaulumut.com/contents//files/11430330676.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/afa8c89c87c933b92ab29aa0921e0e44/guxixavudidumupaxiremuvuf.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/70099281064.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/394c68d2d7ccbebc205c1721f44acaa8/towutukofawut.pdfIn PDF document text
    • http://cdn.eagle.mn/uploads/userfiles/files/25147131310.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/e3a8e35ae617ef780bd7bce9a8ccb770/73856998135.pdfIn PDF document text
    • http://movietek.vn/hinh-anh/files/kumavatiko.pdfIn PDF document text
    • https://ntwbearing.com/UserFiles/File/ruxafedoweruxunul.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/5207c5cdbf452b3157368dee991b6a05/jujiluf.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/beviwowuxugugewatogik.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a726336171---33276927918.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160983e68ae2ad---taparuloselowadutowaj.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160742a8e51831---lemumojosupagado.pdfIn PDF document text
    • http://bioterapiazabiegi.pl/obrazy/file/28201283478.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/d06c77fd8096631fb97c2898dfb5c8b2/39213349739.pdfIn PDF document text
    • http://sooclose.eu/upload/File/xebefusafe.pdfIn PDF document text
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/99846774251.pdfIn PDF document text
    • http://jeremypourstarlight.com/clients/5/53/539822683240d2210db56c0084569a8b/File/71621126597.pdfIn PDF document text
    • https://dbmotorbrokers.com/userfiles/file/mozag.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/pos2736rgsvf2rktikhbhqvj9h/rokarudedefazazapuboxe.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD42 16948 bytes
SHA-256: bd549d01e086e98bc5d2e3500e70fdfa8474bd5c7b278d3e46f316266b8a29b5
font_01_sfnt_off0000e8ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CE 10128 bytes
SHA-256: 26dd7f03a4234654f27eeab1d8c0a299e91d211bdb1728f64daa847bbfe15cfd
font_02_sfnt_off0000ff8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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