Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d9a2ca4fd8a5a9e…

MALICIOUS

PDF

90.0 KB Created: 2021-06-27 13:20:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 642c6e223834a4caa8cb112a5da1ee21 SHA-1: 7e42ea9f19f9b247045cf0701d0fb911ddd0208b SHA-256: 0d9a2ca4fd8a5a9e43adc990618b413bb5d135542cfcf8db534664eab772dfd5
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to lead users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://krisoc.ru/uplcv?utm_term=cards+war+adventure+time+download
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160aa6a10e7e80---duwiwogawivunewofonomi.pdf
    • http://cosmic-kino.ru/sadm_files/17891598938.pdf
    • https://mojer.bg/files/24664491120.pdf
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5b46f45014---sujataxe.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2e6a74ec7---setotokeziwubomunupusebaw.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160798fe21b101---patuxelaga.pdf
    • http://sun-green.de/ckfinder/userfiles/files/94656817596.pdf
    • https://aadhaarretail.com/administrator/imagetemp/file/duvobiwamokivigagub.pdf
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16084f42f99eec---20748709860.pdf
    • http://ck-tct.ru/userfiles/file/31627571465.pdf
    • http://mateuszkucharski.pl/admin/file/pivotodubogi.pdf
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/bd7c4bc0de9e559f4ab451e385186876/buzejiwolox.pdf
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/4488dc1f2d92d23e92ad8ecd6ae0ed73/xajadoxevukati.pdf
    • http://waukeganeast1980.com/clients/877304/File/tekomijobazagajisewezidi.pdf
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/607f328857df30ec16a6bbee5a299210/juzadanivewiwexan.pdf
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/t0cb5lmv21msva576v0b1spasp/xonogujumisukireral.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/1k69psa1k7l4p82c2vspc2ak21/kuwixiwogojodezazapop.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dffb5a3d48---lupokenoxame.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608056ade3f3e---27610601140.pdf
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b1299aa1b---89799493827.pdf
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/442c18758f7d1247a89a66bed9e9acc7/xisizerovuluviferalutexam.pdf
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/8b99d228e68337dc72d315e9238c7205/xigamutexipivewanak.pdf
    • http://emotionpicturesfestival.gr/userfiles/file/52900428311.pdf
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb2823d00a---ruguralunekiwaxobuw.pdf
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/0c84c454e86fc2c695ab910c904117f4/nopavotukizovesupetoxuf.pdf
    • https://q-web.ro/wp-content/plugins/super-forms/uploads/php/files/dbo5q1j7idekd2v0gvqqlcho75/fosolumuzutozarunowumuwe.pdf
    • http://dchs1961.com/clients/871949/File/70854033928.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_off0000f095.bin
6684717465b641d77b59eee3ff2add878dd0f5d3eec4f56fada6637cd30e3b3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF095 27408 bytes
font_01_sfnt_off000129cf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129CF 16792 bytes
font_02_sfnt_off000141e6.bin
187a0ac5b27384fd69f67fe4baeda219879464aaa7a5d61c593045dd2c501468		 pdf-font-stream PDF embedded font (sfnt) at offset 0x141E6 10692 bytes

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