Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d777160c591de9f…

MALICIOUS

PDF

96.1 KB Created: 2021-09-01 01:26:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4c216bbc1d244973be8903fcd5c4b0f2 SHA-1: 96ca95ebe385e4db8144aa976a38775dac755ebc SHA-256: 2d777160c591de9fde7cdc3827574442979432b0faa63ba804d82a9b0b887399
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It functions as a link farm, containing numerous links to external websites, many of which appear to be hosted on compromised CMS uploads or disposable domains. The embedded URLs suggest an attempt to lure users to download further content or visit malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jkbprivateiti.com/userfiles/file/99071175590.pdf In PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db18a6d04d6---91700732081.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a5477f8dc---3142122357.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/32586884699.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609c3f04c76d4---78326860930.pdfIn PDF document text
    • http://thepokewave.com/uploads/files/45938025634.pdfIn PDF document text
    • https://sharpconsulting.us/app/webroot/ckfinder/userfiles/files/60485737394.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/xidovon.pdfIn PDF document text
    • http://shriadinathbank.com/uploads/gixumupotoz.pdfIn PDF document text
    • http://www.ville-dammarie.com/ckfinder/userfiles/files/fegarajowofexiti.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/foxawomepo.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/4ad7ad0adc901c8ab29a0d16df00b404/xakirobofidinagi.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/lbm6q3781lsq9jgaf54vb39s4g/nonafofibal.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160870b6bbcb31---xarokuvipirojenofexefoga.pdfIn PDF document text
    • http://barksdalereunions.com/clients/869108/File/bipama.pdfIn PDF document text
    • http://steelfurniturecn.com/d/files/palopidalifutaxorula.pdfIn PDF document text
    • http://tabbanbros.com/admin/fckeditor/editor/filemanager/connectors/upload/file/61851865283.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16086052bf077f---77807991662.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/69ae7fb45109485de99bfd366bc8e170/21273939237.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/k6p3nsq9g56dgr96qn0tnabkv8/40357670642.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/0c8c8d203998a01a4347dbcc30269bec/remalojivulax.pdfIn PDF document text
    • http://fotografiafrancescosomma.com/userfiles/files/tizekev.pdfIn PDF document text
    • https://northwestconvention.cz/data/files/xuzefuxolipapegiko.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=easy+steps+to+chinese+textbook+5+free+downloadPDF link annotation
    • https://inspirazionedun.blogspot.com/?book=7561930003In 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_off000104e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E4 22400 bytes
SHA-256: fbd8d8c5b58daf08cd514544a1f6fbc38ebf100a9f2b0a1ea73bc825e7525831
font_01_sfnt_off00013f79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F79 11368 bytes
SHA-256: 4b80e1a88f33271bc2bc3c42bec494de57349305c62cffe8151122e93b575f00
font_02_sfnt_off00015a1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A1D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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