Malicious PDF — malware analysis report

Static analysis result for SHA-256 82eaaddcbee2ed9b…

MALICIOUS

PDF

83.5 KB Created: 2021-09-05 20:30:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 57234f39bda485c220461dd8ab9024a6 SHA-1: 39ecb9f9c2a4281a75a77d1a88342164a501b722 SHA-256: 82eaaddcbee2ed9bac93c91ce901cb0e0304ba05485f84f69f4f4ff935d43dbd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm hosted on multiple domains, some of which appear to be disposable or compromised, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • 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 http://platcometals.com/images/file/gobivo.pdf In PDF document text
    • https://planet-for-events.de/userfiles/file/bovexuti.pdfIn PDF document text
    • http://altinay-law.com/images/file/83084530673.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d42ce3a0b21---34724019328.pdfIn PDF document text
    • https://termokingbt.com/ckfinder/userfiles/files/62574308937.pdfIn PDF document text
    • http://reversetheclocknow.com/ckfinder/userfiles/files/kupigezazuloju.pdfIn PDF document text
    • http://ulv-fogger.ru/d/files/36983333078.pdfIn PDF document text
    • http://oicenglish.com/imagexx/files/zibuju.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/f6291d47fa11d57b88c36180fe2a7c97/wetubarelu.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/d6f96bd13bd6a11b09227266c3eca08e/noruvoludatunanu.pdfIn PDF document text
    • https://toskov-yordanov.com/userfiles/file/faparumewuteg.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/fobivuguvaxu.pdfIn PDF document text
    • https://itexpertdog.com/upload/files/57317362974.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/55822685226.pdfIn PDF document text
    • https://mfdesign.hu/files/file/7257305254.pdfIn PDF document text
    • https://aptitudeclass.com/ckfinder/userfiles/files/diraxuperaribi.pdfIn PDF document text
    • https://reklama71.ru/upload_picture/soperexokowipilefoseso.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/o31hjs1ad657hbdi8inurijl12/siwefopowijo.pdfIn PDF document text
    • http://kardelendalgicpompa.com/uploadfiles/file/21313963438.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16090c8ae4ac25---88454388774.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/e7eb860800e4ddd95bfc944391726264/feditoj.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/99440280388.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/3fe0da99eb6acb8c7cdd46531a8ea29d/luwivo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=word+doc+to+pdf+with+hyperlinksPDF 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_off0000e3dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DC 16704 bytes
SHA-256: 4fcc93464d2ab8dff3229347c91a078a1121187e653285e519efdcb336749c5c
font_01_sfnt_off00010f1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12732 10840 bytes
SHA-256: 1b2c286fc7b5351fba22fa6da724db246a5de94e9da19698790195b8d335cfb0

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