Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1c195b9c744d5e6…

MALICIOUS

PDF

88.5 KB Created: 2021-06-27 12:14:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 00413483fc8d8f3cbe1d3cd19ebfd197 SHA-1: 97e034f1c5df1f89bdf33b2524d4ad636b2c39aa SHA-256: c1c195b9c744d5e65d135c5ed46a4252389dc4d4f5586bbbe24115e2b873e958
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links pointing to compromised WordPress upload storage and other disposable hosting, indicating a link farm designed to redirect users. The primary attack pattern involves directing users to potentially malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b149e1a2f71---83411774140.pdf
    • http://makingtheturngolf.com/clients/9/92/925d9bae4ecf380f28dbe0e1390c16eb/File/gisasote.pdf
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/0a15f9ff0434915192c77e1b5bd2db04/nopixuxodomobakosepas.pdf
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e7b5e0d41---xijomamuxejakujeti.pdf
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/584f93370742a9ff81ab8b3fbceae16b/xajedokutibila.pdf
    • http://sattamatkapatti.com/userfiles/file/54399396154.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8da528fc6---kukiderinerojiwaxasexe.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080c9543458a---mexofigosexisamimewob.pdf
    • http://sns.hu/_user/file/lovagutuxujexamumer.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/5gsfc3ra088j3o05frmd9aoug7/71029929560.pdf
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160839a5621ca0---8061652599.pdf
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/160856ee3780fa---bonamefukebokipakum.pdf
    • https://riondene.ch/img/uploads/file/19136994558.pdf
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/3393408b976c29ddd3e76b4d646b6613/tebusosabapewe.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098a6e782ebe---fipuduzozuzotikunabo.pdf
    • http://aep-tc.com/cache/fck_files/file/37663824990.pdf
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/dd82aaf4fbb08d9489fa126ec4b0476d/pixawawavonikofabavab.pdf
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/71512d8a04349c69574a20143e14ecff/zifumuromedag.pdf
    • http://jmdfhjl.com/fckeditor/userimages/file/91605503189.pdf
    • http://easternsheep.by/app/upload/file/2010414895.pdf
    • http://rydelko.pl/userfiles/file/dedilalerakefelipega.pdf
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/7r7p2r45flkhmkhp2i6936r6t4/73485486665.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16099fabb39a0c---gukenilopusixovidajiwineb.pdf
    • http://www.mediagrand.hu//data/editorfile/91636811130.pdf
    • http://www.deopendeur.org/imgUser/file/vibukebolof.pdf
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/darebadigukug.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=dussehra+dates+for+last+20+years
    • 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_off0000f5d9.bin
81de7a1318865a8bfc7e5652fbab30978c3f4ea9523a94825f5363e6ec3c3061		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D9 17520 bytes
font_01_sfnt_off00012386.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12386 16792 bytes
font_02_sfnt_off00013b9d.bin
a4aa282c410f8b0ef59092f433d1d96ae01792b2d455774f967127ec6c3ef9ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B9D 10712 bytes

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