Malicious PDF — malware analysis report

Static analysis result for SHA-256 e12e084005291632…

MALICIOUS

PDF

83.6 KB Created: 2021-10-04 22:23:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: f7162783b24ef653b34e988519c71564 SHA-1: 437380ae7ab1de3be3c9dc921d4f2497b6464124 SHA-256: e12e084005291632777835a27aa6b0de16bff347bb491b7f799b3455a736fd98
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. Heuristics indicate it functions as a link farm, with numerous embedded URLs pointing to potentially compromised websites or disposable hosting. These links are likely intended to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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=easy+meatloaf+with+oatmeal PDF link annotation
    • http://maquinandoysubastando.com/dleyes/admin/fotos/file/ranogejaxuvafitawud.pdfIn PDF document text
    • https://bipalisdemo.dashindonesia.com/userfiles/files/54565678664.pdfIn PDF document text
    • https://obrbikes.com/files/files/zifoxosaxajonezamusedo.pdfIn PDF document text
    • http://locthanhwindow.com/img_duhoc/files/vatotiwabegow.pdfIn PDF document text
    • http://langfordfinancialservices.com/userfiles/files/sokexigalasob.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/18586693701.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/jijatexofutu.pdfIn PDF document text
    • https://przygodanaukrainie.pl/admin/ckfinder/userfiles/files/99784430260.pdfIn PDF document text
    • http://autowagon.it/userfiles/files/gafuwux.pdfIn PDF document text
    • https://suksesunited.com/contents/files/33422503549.pdfIn PDF document text
    • http://king-tableware.com/uploads/files/202110031747502759.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/3331fd208a300488c9700d8e5f8c423a/55467183320.pdfIn PDF document text
    • http://nemalipics.com/81901163580.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614c254ff18e5---mijulufasojafazerosase.pdfIn PDF document text
    • http://xn--b1afklwjc5g.xn--p1ai/ckfinder/userfiles/files/20121229637.pdfIn PDF document text
    • http://pm-ural.com/uploads/files/73461544688.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/069e04c2f3030a2dd58878ad3fe41e35/fodagenawijawafig.pdfIn PDF document text
    • http://associazionemillesogni.it/userfiles/files/fopovupu.pdfIn PDF document text
    • http://maudchristan.nl/ckfinder/userfiles/files/29403168200.pdfIn PDF document text
    • https://bibliotheque-des-arts.ch/ckfinder/userfiles/files/39544785817.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/pamatos.pdfIn PDF document text
    • https://trinityautorepairs.com/uploads/files/6485340394.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_off0000dfb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f7c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C9 18712 bytes
SHA-256: 2760942945853c69c196cce1720cf60ce1fe7a0e742b60878811a9d4a308d181
font_02_sfnt_off000128cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128CC 10456 bytes
SHA-256: a146fa45bd67f0b807e1049df24c90d950b5b07a3153f45c9bba6b033b57b615