Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1259a2999ad73aa…

MALICIOUS

PDF

115.0 KB Created: 2021-09-02 13:56:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0e599f821734843454bc43cd287d34d1 SHA-1: e596b22ad0be8d7aecb758e999731d51b52ffbc5 SHA-256: d1259a2999ad73aa5b957da62059b14a231fcd8c333f03cfc1b535e9a0f4e77b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier as malicious. It contains a link farm pointing to multiple distinct hosts, including one identified as a compromised CMS upload, and another on disposable hosting. These links likely lead to phishing pages or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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 http://frappsreagent.com/upload/files/vikutubedetebujiba.pdf In PDF document text
    • https://kodcomputers.ro/2664/uploads/zikiv.pdfIn PDF document text
    • https://penzionradvanice.cz/res/file/revufub.pdfIn PDF document text
    • http://thetuckerfamilyreunion.com/clients/67950/File/88449347598.pdfIn PDF document text
    • http://clubselectionvoyages.net/images/file/93053480119.pdfIn PDF document text
    • https://ivanamihic.com//files/zelururazogigetopetaxa.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/3s3khfu9bkc9fj1a15ranphft0/53215141799.pdfIn PDF document text
    • http://gaongonmaiphuong.vn/webroot/img/files/zitidolawepinude.pdfIn PDF document text
    • http://tandprotheses.com/ckfinder/userfiles/files/17140245214.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/e6385ae7ba978984984d3c8e48eadb2c/mavudazenilidamonimug.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/4960798522cc0f154bb55d2d400affb0/debedojenosiv.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/63063063793.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160815a03b01ab---43181583162.pdfIn PDF document text
    • https://hijaustabilo.com/contents//files/bukugenuxawumugezowof.pdfIn PDF document text
    • http://ourjamesfamilyhistory.com/clients/1/14/146a9f92d0a296c7c29e793db058bb30/File/31024545634.pdfIn PDF document text
    • http://merwepizza.com/upload/file/50914356670.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160757107d224b---30273487240.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16119c8008efcd---zazebipavuwanororegoz.pdfIn PDF document text
    • http://myphamasia.net/upload/files/44959183966.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/eed2c463a1c9c7e1d73dbe4c5e183708/sogajufutozedaxopeda.pdfIn PDF document text
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/1788f914a8b24834575e475edb9cd40b/bamoruzefigepa.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec7de159f1---35624026135.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/8311520068e17ceb8421dc0e8e2ad67a/nukegirosimeputul.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/97385846368.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/4kf25rciccjsnnlkdih36c4cmp/mizitotejip.pdfIn PDF document text
    • http://studiosimonepantaleo.it/userfiles/files/fuxuwasut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=recherchev+excel+2007+pdfPDF link annotation
    • 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_off000157e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157E4 10480 bytes
SHA-256: c96ec47b9969e68a12bddbc0b26a7565deba9cc50ec05467dc94274f5ec2d0ec
font_01_sfnt_off00016fee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FEE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00018800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18800 20760 bytes
SHA-256: 6d1343777c839896f4433365c9ded8edab0b667f4a88962c05f4b4340a0f443a

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