Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ab25450a2a32d6d…

MALICIOUS

PDF

88.5 KB Created: 2021-07-31 11:30:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4e0d38108ef7b9692b6bfec076b468fa SHA-1: c8fa259d18f162770ad324453b4ee4a85f8d3626 SHA-256: 2ab25450a2a32d6d2bf9d253e837d063e28034c533e6cc95a983f322aee7f909
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. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the overall structure indicate an attempt to redirect users to malicious content, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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=quadratic+equation+questions+pdf
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/f29b8fe558020f1a39352fa88105e552/fosizawipijobafolonokosu.pdf
    • http://kingtonkatsu.com/uploads/files/dopuritenujopimox.pdf
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/18a174a48434517b4292ece538592a2b/66522781108.pdf
    • https://bandotrading.com/uploads/file/sarobow.pdf
    • https://pui-vital.ro/msg_media/file/48975266371.pdf
    • http://autavrabek.cz/obrazky/file/68303468537.pdf
    • http://suacona.com/clients/16856/File/63031041507.pdf
    • http://nieruchomosci-swidnica.pl/userfiles/file/54525755392.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160738fa4abab1---80999206672.pdf
    • http://linpus.com/app/webroot/userfiles/files/vukulemokudalinigifurawas.pdf
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16091c0350e0cd---luxamuxigovaluwis.pdf
    • http://epmachine.ru/d/files/56016999085.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d2d4a75f0ef---rofupaju.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160740abf111e1---21701868547.pdf
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16094918c9a6d0---vajazegulukapame.pdf
    • http://skolicka.eu/foto/images/file/ragizebofamunegutimavizut.pdf
    • http://suacona.com/clients/16856/File/bifavunitikatamekajot.pdf
    • https://imagebeaute.fr/userfiles/file/bavamilinofivuxinazu.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/6f8575fbb976cd8affe1bd3ac153c7e2/92031147572.pdf
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/224a6f673349d6adbb47d326195b2b6d/kulogevozupodomesoti.pdf
    • http://thunderstar.cn/userfiles/file/20210701145012265510800.pdf
    • http://obchodsezlatem.cz/upload/files/dobaf.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fd8bb1f36a5---nasabefidavufabubojiwuwun.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160b84d23c6943---fatitusutifat.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/cadb9dc45efa4132927eb7fe08867e35/54629260110.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/qrgf872n3e6efirbi1pnofbe9g/29263901008.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1cd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CD 16792 bytes
font_01_sfnt_off000109df.bin
843295f540708af6fb81c5132d25997b54208d7265d178adeb2d0372cac40758
pdf-font-stream PDF embedded font (sfnt) at offset 0x109DF 18100 bytes
font_02_sfnt_off00013a46.bin
68fd8aef9c49874b78a517d1583835dec220595cc9a86b0c8f5f6d0b4c827308
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A46 10872 bytes