Malicious PDF — malware analysis report

Static analysis result for SHA-256 357336b400adae85…

MALICIOUS

PDF

102.2 KB Created: 2021-08-30 13:35:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2b6324d8c8fe6eb63690ba24e8c5c994 SHA-1: da27dfc500e7df3791701722bc59d2db144623ae SHA-256: 357336b400adae8503bd6e59afcd06d99fd50434cdcfde71c8f4dce0374e35e6
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://queure.ru/uplcv?utm_term=countries+in+stage+5+of+the+demographic+transition+model PDF link annotation
    • http://aroma-es.site/yamituki-n/uploads/files/ruxazezolasimovurituba.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/2517796009bb3836a223c34b04a64d8f/tatuxunuzaxuribaj.pdfIn PDF document text
    • https://steklo-shik.ru/userfiles/file/10613579053.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/j77dq8v62ij1r8bv0rbe01jcs9/wusizagazifojuvotod.pdfIn PDF document text
    • https://dialogueinpraxis.net/files/docs/titaduwusok.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f05a2290ef---zefonizobixovus.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611aca4edeb36---pegerifobupot.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe06956c93---99341098262.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/godurisevalimotapa.pdfIn PDF document text
    • http://atomleasing.ru/media/File/medek.pdfIn PDF document text
    • http://ibrahimalsada.com/pics/file/46933377372.pdfIn PDF document text
    • http://cukierniabrzezinski.pl/www/artizam/fck/file/42204957656.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a70336480---fofudumedubipozosajewise.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/86277349807.pdfIn PDF document text
    • http://midlandhigh65.com/clients/6/68/682e31fde28f8c6bff7ebba57332ef5f/File/51025990820.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/76134528840.pdfIn PDF document text
    • http://edisonprivateschoolbeta.com/cote_dor_import/admin/ckfinder/userfiles/files/80849246177.pdfIn PDF document text
    • https://afayl.com/userfiles/file/bixujuzumaputo.pdfIn PDF document text
    • http://altronic.pl/!mag2011/userfiles/file/2963439064.pdfIn PDF document text
    • http://ugyvednok.hu/userfiles/file/34724014181.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/2b8569c273a315d0b6542832eec43df0/4435356619.pdfIn PDF document text
    • https://chaletsuenodesol.de/files/83214811628.pdfIn PDF document text
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/25155db2002041f7053414cbf3cd8827/40256396517.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_off000128bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128BC 18108 bytes
SHA-256: 858944762c15f709448da4207372137307d6bd684b069e6b96f461027f62cd13
font_01_sfnt_off000157a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157A4 11332 bytes
SHA-256: beea9648ddf6064a1caa9f87d8c519841cb646588e91011da5bf09f92da1f38c
font_02_sfnt_off000171fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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