Malicious PDF — malware analysis report

Static analysis result for SHA-256 389d718dd6eeb927…

MALICIOUS

PDF

87.1 KB Created: 2021-09-06 20:57:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ede269985eae85419e97070954670a0b SHA-1: d8d90de01db4830737e113753bdcf999e4be4612 SHA-256: 389d718dd6eeb9274b4ae6cca82b76b68327e370f4044a5393beafec3c871096
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains multiple links to external sites, some of which are hosted on compromised CMS platforms or appear to be part of a link farm. The heuristic 'SE_BRAND_CREDENTIAL_PHISH' indicates that the document impersonates Paypal and directs users to a non-matching host for credential harvesting. No scripts were extracted, but the PDF structure and embedded links suggest it's designed to lead the user to a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://allytemp.ru/uplcv?utm_term=representing+whole+numbers+worksheets.
  • 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://allytemp.ru/uplcv?utm_term=representing+whole+numbers+worksheets PDF link annotation
    • http://ekopaczka.pl/imgbrama/files/tuxixulawawopojopeniwaf.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160893cb8d9390---fekewokevarejazeto.pdfIn PDF document text
    • https://toyotaautobody.com/ckfinder/userfiles/files/zijusajugipidu.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/b1616a8a9026e7af9263e417953339bf/xenusesuvawasopa.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607b344e5f447---wujixipukumurexojaw.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4336e354c---53329830873.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/9d6030f1c9b8b7651d56e4278bf28f20/90565890170.pdfIn PDF document text
    • http://nw-line.ru/generic/uploaded/24821690895.pdfIn PDF document text
    • http://kpdb.org/userfiles/files/87563246883.pdfIn PDF document text
    • http://tensoinox.com/userfiles/files/tixonenisadusidunavawazuw.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/78739882561.pdfIn PDF document text
    • http://consoles-a-gagner.com/fckeditor/userfiles/file/92108360660.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/ec83d9ee68c2b72303c7901265ff4056/werob.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161289fdc5951b---lotekugubomobasotaxivur.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a64e5006945---79383658202.pdfIn PDF document text
    • http://exoticland.bg/upload/files/files/dagajuralevi.pdfIn PDF document text
    • http://ornito-silesia.eu/userfiles/file/41692690977.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/40947375386.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/topativul.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160848feac0d59---fejuxisufufoziduwidapox.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/ea3c1207331f5af5ef28d8e687eacb3c/39445120203.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/32070226043.pdfIn PDF document text
    • https://sportyou.fr/ckfinder/userfiles/files/sumosotami.pdfIn PDF document text
    • http://merrygoldholidays.com/ckfinder/userfiles/files/87320748983.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000104d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D7 11000 bytes
SHA-256: 2a1c090cbb2ef1cd93c28f9c4e7431f3cec8f77425321af6bdbf4e46ac625eef
font_02_sfnt_off00011e09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E09 18780 bytes
SHA-256: 353ee7057c28c73bd2d42ce1bab7380f7150b183c46c9a91925bfd847a85c5fa

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