Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b4abe6f92e660cb…

MALICIOUS

PDF

77.5 KB Created: 2021-06-26 04:43:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f8ad728ce6904a43e71e26386d781b74 SHA-1: 50524c43e98fdfa93f7403985043914c04a08849 SHA-256: 9b4abe6f92e660cb167d9dba46c111bba212cd66c956a320d3b724fcaf92c49c
156 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, specifically as a phishing trojan. It contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, indicating an attempt to redirect users to malicious content. The presence of multiple external URIs and the link farm structure strongly suggest a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 http://dohertylaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/46536672542.pdf
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/30db7fd9d0a2f84578e1c3e465d34652/75025601460.pdf
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/3f3a4ae84e98b41bcd27ff385e088a6a/gelokogevuxuwozifamesibe.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160988c225b94e---35743032877.pdf
    • https://rajatotogroup1.com/contents//files/93736569354.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c314f03a233---suzap.pdf
    • https://ddshower.com/ckfinder/userfiles/files/potefuwor.pdf
    • https://belhasasecurity.com/userfiles/file/17053455688.pdf
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c09a0353bad---jawexudogotetaxuvaserukag.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/cv1bitnjk8li2u36gnll6jj13g/93209491279.pdf
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/p0ahg8omui0kf7polb8eh7t106/72467079872.pdf
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/js2vod5dkevmp9722rgqg6tnk8/fezal.pdf
    • http://kimdaiphatsteel.com/Images_upload/files/78358050584.pdf
    • http://mwflower.com/upimagesfile///95538618683.pdf
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/qice3rbhdf77md9erp67vfd6nb/17056904879.pdf
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/74ea9f52620b3146237d363266967aab/jametidiwukezunutexebap.pdf
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/e915b2dc2d46c5d33833be44ecaef55d/renupuxorav.pdf
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/5hrhrtu6804v22q3farmbl1gdk/jixoxemanenudazotev.pdf
    • http://riskhedgetech.com/uploaded/file/152159130760a5aad40f855.pdf
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1609236769ad03---vozotolekuzexusexewom.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608c395ebcc67---gituvizonulimej.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/fntsdh248vnucs4tanjaacec9n/65570990604.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=diction+simple+definition
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb5c.bin
48f545ef609629d4fa221f04ce2b126f265becfc3294d28bca2a1f8e383b05e3
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB5C 17084 bytes
font_01_sfnt_off0000f795.bin
8dcbffce8c67d5a58e2355941cd8f7020628c744c1bf6b61eba6c588dd073b81
pdf-font-stream PDF embedded font (sfnt) at offset 0xF795 10520 bytes
font_02_sfnt_off00010f81.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F81 16792 bytes