Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbaffb71926b340c…

MALICIOUS

PDF

84.3 KB Created: 2021-09-07 08:07:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e4a989981d10ac1b4efaabb7a6741100 SHA-1: 0da9683ed6499d588b362a1a8c1ea646e00c4f93 SHA-256: bbaffb71926b340cddcd930383e3254368a5db31cb90e5c5e5929a35130363ea
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of external links and the nature of the heuristics suggest the PDF is intended to lead users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://coretry.ru/uplcv?utm_term=que+es+agrimensura+pdf PDF link annotation
    • http://opusincertum.it/userfiles/files/72632560296.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160791317c31e9---38332360094.pdfIn PDF document text
    • http://banphimchuot.com/userfiles/file/tifuvitorilowapepinexibu.pdfIn PDF document text
    • http://sweed-trans.eu/ckfinder/userfiles/files/89561236711.pdfIn PDF document text
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/g93pjlhlhdrtqfq922pt8vqgd7/paxawejupivesotamawu.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/14ef07956c8ca91abc339ab2d87bb9ed/35648200256.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/b051fcf7cb54d9302e2b4c3a9fcfb47e/15909195045.pdfIn PDF document text
    • https://www.privathospitaletkollund.com/ckfinder/userfiles/files/33296124531.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/4b55c2a4c18dc18fd13dfcf0dd016cd7/janidovigukelepuzuzoza.pdfIn PDF document text
    • https://bevelec.com/bevelec/dossierMois/file/94915906731.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb472559d5---28064154245.pdfIn PDF document text
    • http://newtarrytowndeli.com/uploads/files/laribige.pdfIn PDF document text
    • http://wernitznigg.at/files/53239856656.pdfIn PDF document text
    • https://kuzeyilac.com/resimler/files/mukitujoroguvoweboluf.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/151e22eb25aee380e57d34e63683443a/paxidonutora.pdfIn PDF document text
    • https://casabresciani.it/uploads/file/19254693658.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/9dn7rea1eap5hqmv2pfmjqga0j/mefutokowafubasubapo.pdfIn PDF document text
    • http://yer-krasnodar.ru/ckfinder/userfiles/files/vawedazuje.pdfIn PDF document text
    • http://cicm2015.mist.ac.bd/app/webroot/ckfinder/userfiles/files/57306011704.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160b34e3e8e62a---podifelasejebin.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/2673684635.pdfIn PDF document text
    • http://sillajen.com/fckeditor/_upload/file/maledujesojilamezebo.pdfIn PDF document text
    • http://viewcs.com/partner/upload/dextfile/lefizenutanagu.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610fed33e9d28---kiwofude.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_off0000e071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE071 19568 bytes
SHA-256: 7b5889929d886f732784fa95bbeaabb3156f07cb0db33bd652a823bd4b03f64f
font_01_sfnt_off000112b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD0 10736 bytes
SHA-256: 82c7429993b95c1418eba21debbedf9ce8cd08add3536185098405e0c2185a7b

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