Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8a199554e48bcc5…

MALICIOUS

PDF

98.9 KB Created: 2021-07-19 11:01:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 364b91ae505f9b123bcc363450e14f8d SHA-1: d51d42a711f35b57cb70d983174dc7193db44f17 SHA-256: c8a199554e48bcc575dd06a1ac5549c9504663bd41594c1bc4326d7565faf81a
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. The document body is unreadable, but the presence of numerous URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://irina-beha.com/ckfinder/userfiles/files/jobemuz.pdf In PDF document text
    • https://hse.tw/upload/file/xixipubarabutaberufenupip.pdfIn PDF document text
    • https://colegiumaniucarei.ro/ckfinder/userfiles/files/83498016175.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1607c16b647ab0---voxugefakodaxuxagere.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/7152519434.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a07cd30cd47---15975989652.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/1822aa299054f22cacaf28894f4e86c2/togoluxizadopexupaguvitax.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093d3ef904df---vuradalavozitevipanimebu.pdfIn PDF document text
    • https://synodradomski.pl/userfiles/file/josemufawerufiletu.pdfIn PDF document text
    • http://laweasy.kr/userfiles/file/tolewagokefixanulukofusu.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c95e92d56---40145726489.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/511g60ed642svgj2u3f038dhp2/21843393264.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/73f09a18bf15f5ebe9956348173d3fe6/pivomefonazivuzew.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/080f200a73eeba73aae6f8c1e37084d5/lexowidukew.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607578a4bec1e---fatadumevujofisoxafabo.pdfIn PDF document text
    • http://musikpark-live.de/userfiles/file/fikaxuwulemunivofipo.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a34a20c5a6b---wirogafejekis.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160dbae1d23272---77879533083.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/dlhkqn5v5lplnc6no83humthrq/sogukolobewofamapelejo.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160717048d3664---78029007341.pdfIn PDF document text
    • https://ijpdua.com/contents//files/mogegepik.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/gbj58dc2lcc58s1qd2u8t8ojt5/ropune.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=primary+koch%27s+infection+treatmentPDF 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_off00011e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13615 18360 bytes
SHA-256: 665a01dd25a157e001b560f88da3791ac50e40a08d22b9c2f668fb0c9585566e
font_02_sfnt_off0001650a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1650A 10796 bytes
SHA-256: 671e911587bceb9cb084e460f7b24f23b066e127353638db4d850f20f4b02dbd

Open this report in the interactive analyzer, or submit your own file for analysis.