Malicious PDF — malware analysis report

Static analysis result for SHA-256 b14b33da3e071b59…

MALICIOUS

PDF

83.9 KB Created: 2021-09-22 21:08:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0938c996d92441990e3327b467f19a01 SHA-1: ada8ec9f71fa9dc00c920421ccdab21f5007eb31 SHA-256: b14b33da3e071b59eb42ba2bc06946e0b17cdb6787ed625283668df3daf4b6b4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains numerous links, many pointing to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. One URL, https://pixomot.ru/uplcv?utm_term=amazon+prime+video+apk+premium, indicates a lure related to downloading software.

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://pixomot.ru/uplcv?utm_term=amazon+prime+video+apk+premium PDF link annotation
    • http://www.sauminandy.com/fckimages/file/32249542505.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/71dc6c1df734936c250f742aae378bc4/50119629428.pdfIn PDF document text
    • http://dientrotiendathc.com/media/ftp/file/rituluwuxizefi.pdfIn PDF document text
    • http://www.schule.havonix.com/ckfinder/userfiles/files/widowomaluzapezusetilireg.pdfIn PDF document text
    • https://www.aledrukujemy.pl/ckfinder/userfiles/files/sukimafosudono.pdfIn PDF document text
    • http://muacuoi.vn/Pictures/files/63475608860.pdfIn PDF document text
    • https://kalendarz.probik.pl/fckeditor/userfiles/file/64843625813.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/1083820c88a1d2f0d68ca237195d8ef5/vikesepadikojopali.pdfIn PDF document text
    • http://tauroconsulting.pl/userfiles/file/puvumopumoke.pdfIn PDF document text
    • http://fbrasil.com/userfiles/file///56878334044.pdfIn PDF document text
    • http://go-pxl.com/uploads/files/xopipatelinakewemoka.pdfIn PDF document text
    • http://luchetti.it/userfiles/files/52638193888.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/161336c6e8967b---99422751503.pdfIn PDF document text
    • http://qcfloor.com/userfiles/file/63937779224.pdfIn PDF document text
    • http://acrclubinversores.com/files/galeria/files/fiximewuxujonomov.pdfIn PDF document text
    • http://e-motyle.natura2000.pl/imgturysta/files/xaforagutimobakonuvipipil.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1613e85a3d2bd7---joxukaguragixazofizux.pdfIn PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/lasawesexoporilexuponizi.pdfIn PDF document text
    • http://diamantina-joaillerie.com/ckfinder/userfiles/files/52809372369.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/wupepare.pdfIn PDF document text
    • https://trickapotisk.cz/webpagebuilder/ckfinder/userfiles/files/97547226436.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_off0000df63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF775 19032 bytes
SHA-256: 1e2dbf11dd1b79afca133fae031674d33f2a1879b38e14f4bd6ff3e8ad3b99df
font_02_sfnt_off0001286f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1286F 10540 bytes
SHA-256: 7959d35a2ed3391506b0c04499a7550d8c881544487a26adc547ecd66117aa3d