Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c0fcf4fb5b6aae6…

MALICIOUS

PDF

82.0 KB Created: 2021-09-20 19:01:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8b1b80f9610b69a4d5e4512a93344430 SHA-1: 976fe47bae33a72c079406b23a92502abd2fdbf9 SHA-256: 5c0fcf4fb5b6aae630675c00a41b737d2be27d4e214b1975169915e4d14c13d0
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics indicate the document functions as a link farm, directing users to various external URLs, some hosted on compromised CMS uploads. The presence of 'utm_term=spoofing+pokemon+go' suggests a lure related to popular games, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://huntic.ru/uplcv?utm_term=spoofing+pokemon+go PDF link annotation
    • https://traveletrust.com/basefile/traveletrustcom/files/65976590523.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/5fbo7ifgf1n4n0uue1lh88rs47/rogipuvejab.pdfIn PDF document text
    • http://colorsoftexas.com/ckfinder/userfiles/uploads/vipamitimegi.pdfIn PDF document text
    • http://iseveranscopy.com/upload/editor/file/vafovetadavota.pdfIn PDF document text
    • http://kanalizace-ul.cz/userfiles/file/88872612204.pdfIn PDF document text
    • http://bilafafafa.com/shopadmin/upload/files/jewefesujuzaliwelolurav.pdfIn PDF document text
    • https://handientu.vn/userfiles/file/vubemipexuvajalotaza.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614685da4f095---sifisiwawowonovifubitiful.pdfIn PDF document text
    • http://sportsbettingconsultants.net/cote_dor_import/admin/ckfinder/userfiles/files/basej.pdfIn PDF document text
    • http://bluecreator.biz/ckfinder/userfiles/files/60442914637.pdfIn PDF document text
    • https://dreptultau.hotnews.md/upload/userfiles/files/zozif.pdfIn PDF document text
    • https://rimsball.com/ckfinder/userfiles/files/zabufuzubemobunotonoda.pdfIn PDF document text
    • http://lovesenergy.com/file/togime.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16140c353a8d97---32599977280.pdfIn PDF document text
    • https://flomogroup.com/upload/files/tedeferuwuvojowoj.pdfIn PDF document text
    • https://sistemagestiondpr.co/userfiles/file/93974950697.pdfIn PDF document text
    • https://discovercefalu.com/_data/images/file/84229688518.pdfIn PDF document text
    • http://sportsgarten.com/editorData/file/39168533886.pdfIn PDF document text
    • http://tlumacz-bialystok.pl/pliki/file/83618554109.pdfIn PDF document text
    • http://a2hgghk.handylover.com/upload/files/nogazonejedofuledi.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16147e327538d1---39372935717.pdfIn PDF document text
    • 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_off0000de0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF625 10296 bytes
SHA-256: 1b66a963074f87d28181d79064801ec8c7f2bec6e28eccd20f4305bf47d426da
font_02_sfnt_off00010d4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D4F 17564 bytes
SHA-256: ec7ba61a74d619ac69f7094efc08f8491704d744224b457cd83d05d0d2d37526