Malicious PDF — malware analysis report

Static analysis result for SHA-256 fabd799c38020d50…

MALICIOUS

PDF

82.7 KB Created: 2021-09-11 07:30:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: dea330db3cafe97eddfce846cc29a39d SHA-1: 43b1ee12d3f377932fe00ca3fad03e318bd1b342 SHA-256: fabd799c38020d509cfa1897e2b9fe0ec29465409ccc5e6cfea41e86f67108d9
204 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing and malware distribution attempt. The document contains numerous external links, including those hosted on compromised WordPress sites and disposable domains, suggesting a link farm designed to redirect users to malicious content. The 'SE_CLICKFIX' heuristic indicates the document likely attempts to trick users into executing commands directly, a common tactic in social engineering attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://oniceh.ru/uplcv?utm_term=truck+logistics+simulator+android+apk PDF link annotation
    • http://plncse.hu/php_data/file/zovun.pdfIn PDF document text
    • http://trustycctv.com/ckfinder/userfiles/files/72420953199.pdfIn PDF document text
    • http://gimnazjum-krasiczyn.pl/img/userfiles/file/63486982902.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/fa1439f027c37ac32ed9ee9e79030810/1418257525.pdfIn PDF document text
    • http://lj-group.cn/upload/files/90986050286.pdfIn PDF document text
    • http://ngocphuocjsc.com/public/default/ckeditor/files/99884635703.pdfIn PDF document text
    • http://forma8.kz/ckfinder/userfiles/files/37649501479.pdfIn PDF document text
    • https://daynexweb.com/upload/ckfinder/files/nofovubabozizovixusatar.pdfIn PDF document text
    • https://amadesafar.ir/basefile/amadesafarir/files/2116927306.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f3f9ad5e7f---75207185240.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1613654c040fcf---woxoti.pdfIn PDF document text
    • https://khanoomhoteli.com/basefile/khanoomhotelicom/files/xexawedotutadu.pdfIn PDF document text
    • https://bcbc3399.com/upload/files/47933447873.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/dmftb46lroub33ku8opf1rb6cb/gagusazogeroxevup.pdfIn PDF document text
    • https://grup-insaat.com/userfiles/file/daxuwigakul.pdfIn PDF document text
    • https://bloomlight.pl/_bloom/file/9454196931.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b2aa2ca97c---xaduja.pdfIn PDF document text
    • http://moskvaznaet.ru/upload/files/62164484648.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/99310598537.pdfIn PDF document text
    • http://origo.ws/userfiles/file/gabosubadoxavasexekuso.pdfIn PDF document text
    • https://makiriaszto.hu/ckfinder/userfiles/files/67918468503.pdfIn PDF document text
    • http://zeguvietnam.com/uploads/ckfinder/files/21103487695.pdfIn PDF document text
    • https://garnizone.com/userfiles/file/919379767.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_off0000dbfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF415 10880 bytes
SHA-256: 2c006e37ec746a8b38ba67cb050d88e802d886167b12e1c0a2606c6a51e2e509
font_02_sfnt_off00010d02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D02 18340 bytes
SHA-256: 690661feeb2d1a8ac5a489bae86a41179f9a2102efda7b5a94773cf6281e01aa

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