Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbf80ac9b6159c82…

MALICIOUS

PDF

81.9 KB Created: 2021-07-03 13:15:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 54e752c1d8b660165805c50c691ec482 SHA-1: a11890b46e3943af1feb812a8fff470eff631767 SHA-256: fbf80ac9b6159c825174a7b7523f17be51943f3f6ac8f153c4ba7327aa0ad932
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links. No scripts were extracted, but the structure and URL analysis point to a malicious link distribution pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/rt0qujsv9hoasi7aa8dn1sv9v7/gonuzubejeginobijowala.pdf In PDF document text
    • https://abofahed.com/userfiles/file/tibefapanudavaxusukasuf.pdfIn PDF document text
    • https://standardpromotion.com/images/upload/userfiles/files/37771792848.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/zokawekomenuli.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160a57f17c452c---5168464677.pdfIn PDF document text
    • http://facilitymanagementassociates.com/survey/userfiles/files/buxefeladozupore.pdfIn PDF document text
    • http://ucinnovation.ru/admin/ckfinder/userfiles/files/98217728378.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/84797342417.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/lepigukumiteguwizewi.pdfIn PDF document text
    • https://cochleartudaskozpont.hu/files/foleg.pdfIn PDF document text
    • http://karmand24.ir/basefile/ehotel724ir/files/42604832676.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4f3bcf85b---zagujaxubizanuf.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160b77dce2f26d---kijejuzelidaxi.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f52527a516---13377749522.pdfIn PDF document text
    • http://debsluxe.com/clients/1/17/174397649ed9f07baa8f9d9f48c72a4d/File/zofevomid.pdfIn PDF document text
    • http://tragadsonisurat.com/ckfinder/userfiles/files/kumuvuwowogisex.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16076b3eac0940---64350445715.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b60ca56d85a---43095183805.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/e148bf39a222e5abba3c14075c711118/36675573092.pdfIn PDF document text
    • http://mbcasc.net/imgs/file/26240109403.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/8155f590b5b88174b8076c62ba3e5e3e/27943034941.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/87ef716e927019b455c14d0e8095aeef/9694387700.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/259ea63173a8d4fb6c3e26329318a423/kedemopelaved.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608676798e862---widojazudenekib.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/26cf3bc109cbae4f156edd69315af269/6029137344.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/b321e34a7b793b0810289781ee269fde/febakutamebomi.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/sajubeneteganaxe.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8433a5c112---68183540899.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=multilate+a+doll+4PDF 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_off0000ddda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDA 18760 bytes
SHA-256: 79fca8e9efe644073bcafb02becc36e6b6f5a5261619d56b012aabaa443ab0dc
font_01_sfnt_off00010bdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000123f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F6 10040 bytes
SHA-256: 724a57657c2c842ce70dd54d0639b285b6705c4e18c345c374c229118ef9b136