Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fb6ccfa0fe33962…

MALICIOUS

PDF

77.6 KB Created: 2021-09-01 07:04:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1dc2bb9062f862b33355703d9e007de7 SHA-1: bab2190af4b46496882732cafe6393e68a6ddc4c SHA-256: 7fb6ccfa0fe339627018f9c929230ba5ba4f516f373890a541444070b82c657e
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple domains, many of which are hosted on compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://rkdestate.com/userfiles/file/vomejowiziwajenegimi.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a77a23d8392---51949042167.pdf
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/3n598jf98njc9ojmv3tmmstaqn/18595724624.pdf
    • http://xahscw.com/userfiles/file/parowesubipapamegexepurez.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e3b7c46f3---tefidisirosaxupebesusawe.pdf
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files/11357502812.pdf
    • http://bajcsidavidfoto.com/_user/file/koxadakona.pdf
    • http://ohadalegistrocbarter.com/ckeditor/uploads/files/16045368122.pdf
    • https://incoyun.com/calisma2/files/uploads/14568785278.pdf
    • https://rh4-h1tapi-turbo.com/contents//files/61142891297.pdf
    • https://chokysitohang.com/Uploads/userfiles/files/61041149892.pdf
    • https://secolink.sk/userfiles/file/23514709849.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe5389245c---99028247591.pdf
    • http://ahchala.com/img/file/65349932720.pdf
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/97486c52f2d00c3b2f9eb6d2b669faa6/lisefenafebafade.pdf
    • http://nutronicltd.com/userfiles/file/sanuxogav.pdf
    • http://m-camper.ru/ckfinder/userfiles/files/69951639006.pdf
    • https://wecareu.net/ckfinder/userfiles/files/76982597015.pdf
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a86d5a86aa9---neduwafivosagabubavenu.pdf
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160ad14a757e9c---90971328481.pdf
    • http://bsl-trans.ru/admin/ckfinder/userfiles/files/xuwimuvepanega.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c198e24a00e---33997793163.pdf
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16098c33f94ba0---rizegodamowijegezazasuf.pdf
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/9921156bbe508b302703ee0ab0ed98d4/mexumosulozikabalived.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=our+parliament+by+subhash+kashyap+pdf+free+download
    • 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_off0000becf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBECF 16792 bytes
font_01_sfnt_off0000d6e6.bin
35a579069f751a92cd10cad621341c7cd967f9ffbdc114d7a909594e903a9f89
pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E6 11320 bytes
font_02_sfnt_off0000f12e.bin
9baf768431e9eedc4407e303559da2e0ece9c8a577b9924a7184a4aa9a3c51fb
pdf-font-stream PDF embedded font (sfnt) at offset 0xF12E 20244 bytes