Malicious PDF — malware analysis report

Static analysis result for SHA-256 a697ce98010384eb…

MALICIOUS

PDF

85.9 KB Created: 2021-07-09 12:02:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 956fc7e5d559173fc0bf75802dce1c47 SHA-1: 1374604d06397c24251626bee1fe5fb97f477cd4 SHA-256: a697ce98010384eb7bad72d1116b17b27d5ba88c89070f0c26c8a1db4de27bbf
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. The heuristics indicate it functions as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable hosting. These links likely serve to redirect users to malicious sites for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160792183cb018---gigubopivum.pdf
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/v46b2p9b7ah7g5rjassrjbm5j2/budep.pdf
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16072da445e925---popezudasidizutikoxesisor.pdf
    • http://on-video.com/movies/movie_data/file/19962068212.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/1vis9q06dqoh6iqhnac3hmfmq5/gurolazogiwepivit.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608afbaa7b929---lasiwunuzufo.pdf
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5849c9715---jasite.pdf
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160ba31b7d5378---88402919617.pdf
    • https://ludifrance.fr/userfiles/file/29535783546.pdf
    • http://banphimchuot.com/userfiles/file/goxex.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4ad203363---35582078200.pdf
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/r09d9s2dm8jsnbdlt5otk2mq1m/95226066228.pdf
    • http://marinapogon.pl/upload/file/ragiku.pdf
    • http://tieclangman.com/Images_upload/files/13325082782.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160826e5c8a145---xopisafudiwugikugiri.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a9b6d5cad---pobimatizagexedi.pdf
    • https://nada70.org/userfiles/file/ribotetifogesixet.pdf
    • http://jshtextile.com/UserFiles/file///34049515257.pdf
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/vgnbs3r5ejmnv81435nda5k6af/mibafofi.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a1e333300ad---41234851602.pdf
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/9c08b40dabdb424b8f3b1fdc970f1d1a/zijob.pdf
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/riwodi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=free+swf+to+mp4+converter
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee6c.bin
8ae507de26c836d15b0150f40d8a6810622a82b74058be195de1af9b695d7fb5
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6C 16848 bytes
font_01_sfnt_off00011a7b.bin
0239f10e6bdcb3ad5ca68cd77bd85f781053d6e7267d250bfd788f1d155a5292
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A7B 10548 bytes
font_02_sfnt_off000132a7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x132A7 16792 bytes