Malicious PDF — malware analysis report

Static analysis result for SHA-256 e264702c0f360752…

MALICIOUS

PDF

79.0 KB Created: 2021-09-01 18:14:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: cd6e2a35fe3b4784746fcefe21082cea SHA-1: 2ec6a60c8799f1c0911f72b819cb9cef4fcf450e SHA-256: e264702c0f360752b2da58e4df7cf6a88a06f80e61dfa476b65f5617c919142f
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 a phishing trojan. It contains numerous links to external websites, many hosted on compromised or disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics indicate that the primary function is to redirect the user to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://archism.ru/uplcv?utm_term=unable+steam+api PDF link annotation
    • http://symbioticlifetech.org/attfile/fckimg/file///20210725163415_598521682.pdfIn PDF document text
    • https://bimetoor.com/basefile/bimetoorir/files/wabum.pdfIn PDF document text
    • http://veterina-naslunci.cz/userfiles/file/40821141658.pdfIn PDF document text
    • https://newtop-eg.com/userfiles/file/65000763019.pdfIn PDF document text
    • https://la-klamm.org/userfiles/file/83629037504.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc87d99e57---25947590515.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/6985eaf25567afc38715f6594c9963ca/dojiraduk.pdfIn PDF document text
    • http://poketomecam.com/uploads/files/fojakukonaniramo.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16093400ee4b7b---16402949245.pdfIn PDF document text
    • https://benhgout.net/uploads/Files/file/kasux.pdfIn PDF document text
    • http://elite-nails.pl/Upload/file/55700982683.pdfIn PDF document text
    • https://rosettes.it/userfiles/file/49116367250.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/v9pqmc2in31rfq9u2ok8jf7ght/bofajerapupiwelurubogodi.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210502042533118.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9e89ec2850---11010798700.pdfIn PDF document text
    • http://udokutscher.de/gfx/userfiles/files/37222710180.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/jfr4vj5a3n96hghjdl0gb4ujg3/5526106296.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/1acef8b6ed83bae678aa66fb7780e32d/bokalazoponugegur.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16075352ff1c18---2130699993.pdfIn PDF document text
    • http://xn--80akoseq9f.xn--p1ai/userfiles/file/xofibuz.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/86181448407.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/47818129324.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1612e633e16ea5---75666315694.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_off0000cec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEC1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e6d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D8 10340 bytes
SHA-256: c0d7335abc2bb9fb53f92a9ba2d21c3b74415107d0ea208c074aa68eb68c2469
font_02_sfnt_off0000fde5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE5 18688 bytes
SHA-256: bb9bae7634d65c6ce3c0aeedff6c2375f576001b1b731ae493e8f846e908b20f

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