Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb018a460e7f28e6…

MALICIOUS

PDF

70.3 KB Created: 2021-09-06 14:48:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 86ae8d3ab635c254229ae031dc5d74eb SHA-1: e017dca92205ed9b3619e18ff826f116dde8961b SHA-256: eb018a460e7f28e6f6877f87de7bd25b53cb5ed0bdaa722379dc237379f9c846
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/d80a79b3fabbd5278d116703e8ec2776/90009882507.pdf In PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e85e22304---kunevidek.pdfIn PDF document text
    • http://immopolignano.lu/images/rolitiwobanitagimur.pdfIn PDF document text
    • http://hyosangjo.com/userfiles/file/20210903091153.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b65925b8a8---mepibisuxadaribazagi.pdfIn PDF document text
    • https://ksuskalology.com/images/file/53255183072.pdfIn PDF document text
    • https://syteq-pro.com/userfiles/file/pigovaloxenume.pdfIn PDF document text
    • http://dream-mebel.com/pic/file/botizofedepijesokesowop.pdfIn PDF document text
    • http://sportsbettingconsultants.net/cote_dor_import/admin/ckfinder/userfiles/files/rurat.pdfIn PDF document text
    • https://magnettoptan.com/upload/ckfinder/files/30243286424.pdfIn PDF document text
    • http://fioredda.com/userfiles/files/tinomigagikemikezikob.pdfIn PDF document text
    • http://studiolegaletrotta.eu/userfiles/files/belamajomobutalax.pdfIn PDF document text
    • http://jikaramen.com/uploads/files/93084154487.pdfIn PDF document text
    • http://dzstock.com/Upfiles/file/jugidirejejibuk.pdfIn PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/60af70c07be9b39ecf6ebb215cb3bb67/71547060067.pdfIn PDF document text
    • http://viswinkelindex.nl/images/uploads/80588730203.pdfIn PDF document text
    • http://zetrade.cz/userfiles/file/26886225518.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4db21aebcc---48337135899.pdfIn PDF document text
    • http://avs-market.ru/admin/ckfinder/userfiles/files/metefexuzenu.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eaae254d96---11585701396.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/7cf68asm2e4egoe6vog3k4e1cq/vuramileva.pdfIn PDF document text
    • https://patidarpalanpur.com/web/k/main_admin/ckfinder/userfiles/files/xugevilerusugov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=foxit+phantompdf+express+for+hp+windows+10PDF 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_off0000af36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF36 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC748 16580 bytes
SHA-256: 5fc9610a92c47dd609d3e4ba2595f43d641fdad5d1578bb6db268ee7c39fb00d
font_02_sfnt_off0000f1ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AC 11056 bytes
SHA-256: 2e7d15092c259b540b5e0755bf354b98ce842050df2a57b53948d36b7661e1fd

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