Malicious PDF — malware analysis report

Static analysis result for SHA-256 e228db1f601c3b60…

MALICIOUS

PDF

88.3 KB Created: 2021-08-30 01:56:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 7b9889413cf782c2c69c4e973c852e98 SHA-1: 60870d2f815970deb60bc62536ae484d31b1ecd7 SHA-256: e228db1f601c3b6083747f7aff37ca5ba9f61a37815e0374fc9a7288bb3e6961
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many hosted on compromised WordPress sites, designed to appear as download links for popular games like GTA Vice City. This suggests a phishing or malware distribution scheme disguised as a game download portal.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://agermag.ro/mm/file/zakomafuromuduleke.pdf In PDF document text
    • http://bettekingproductions.com/clients/874300/File/nevawonimebirama.pdfIn PDF document text
    • http://autoscuolepintozzi.it/userfiles/files/kugikebowipuwuji.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606fed5a50b3a---tafejikexazamisoduwevi.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087bd52c542e---romupilitufokaxuk.pdfIn PDF document text
    • https://study4student.com/cache/fck_files/file/somubupetivitenu.pdfIn PDF document text
    • http://martom24.pl/martom/userfiles/file/xafuwovapesufezixegaso.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608458f0a56ef---66661470174.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609880268d4b8---luwuk.pdfIn PDF document text
    • http://kup-vino.cz/web/ckfinder/userfiles/files/78846477550.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/97300807612.pdfIn PDF document text
    • http://vallovin.it/userfiles/files/luvasefenewukisukewew.pdfIn PDF document text
    • http://chhattisgarhsanskritboard.in/sharpinstitute/images/files/fegifeseniwinaxeradedaxak.pdfIn PDF document text
    • https://xehowo24h.com/images/ckeditor/files/52367994303.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/8941e6be3edf09dc46cfaa3224e33675/12143405955.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090c66004e3c---581474432.pdfIn PDF document text
    • http://nenorm.com/files/files/nivavezonefimepuvudetem.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/fc262a754b7dcdbeefb1689a504e0bc0/83470142810.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b487fae14fc---67033063606.pdfIn PDF document text
    • http://mea-travel.pl/userfiles/file/woxetubipox.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df84b40af9---samojir.pdfIn PDF document text
    • http://cosmickino.ru/sadm_files/fasugedumideguwil.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160819b6465aaa---12118133078.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=gta+vice+city+free+download+for+pc+windows+10+64+bitPDF link annotation
    • 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_off0000f053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF053 17672 bytes
SHA-256: eb054995dce253cb5a1aa5eca458b60e02fbe944a78ab5c3a953d4b6448b0f8c
font_01_sfnt_off00011ee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE3 11480 bytes
SHA-256: 4c74dea90a05eb8a844635bce23e383d497ff317c148ab4d2267d857ffe2003e
font_02_sfnt_off00013a21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A21 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1