Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaf0e40ab7001412…

MALICIOUS

PDF

81.0 KB Created: 2021-09-15 17:21:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9e6ca57095a0ce1980fddfa32e462d46 SHA-1: b2a05123b073ef940ed7497d93c16926c2c4ac23 SHA-256: eaf0e40ab7001412feafec8a3f3002bbc8b5e94fa49c893f96dd9b4a07beeda2
196 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 or trojan delivery mechanism. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document instructs users to copy and paste content into a command-line interface, a common technique to bypass initial security checks and execute further malicious code. The presence of numerous links, some pointing to compromised WordPress uploads, suggests an attempt to host or distribute secondary payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://ancoraeducacion.com/images/dazogel.pdf In PDF document text
    • https://rrrc.us/userfiles/file/wonis.pdfIn PDF document text
    • http://investin-khj.ir/ckfinder/userfiles/files/tatisaliwinewabapiki.pdfIn PDF document text
    • http://clinicaveterinariasangiacomo.it/userfiles/files/minimudutinumutevamosa.pdfIn PDF document text
    • http://mrtowing.ca/Lawyers/userfiles/file/45258891539.pdfIn PDF document text
    • http://garantc.ru/userfiles/file/fumonaminamajebefopalod.pdfIn PDF document text
    • http://topspeed4wd.com/ckfinder/userfiles/files/sukudegikoper.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/rqis5gmkuab8v7i2j7no1gabq7/46028316122.pdfIn PDF document text
    • https://bulgariapools.com/contents/files/82768034341.pdfIn PDF document text
    • http://keifo.ru/ckfinder/userfiles/files/96855584019.pdfIn PDF document text
    • https://jensbrode.de/files/file/49983715458.pdfIn PDF document text
    • http://dayou.tw/uploadpic/files/202109080651437436.pdfIn PDF document text
    • https://motecx.com/images/file/50620068529.pdfIn PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/83216218079.pdfIn PDF document text
    • https://ketex.com/trcgp/ckfinder/userfiles/files/jesigapamosogos.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/fe1161975e9fa1c16c71c044e6bf54e5/faxobidefuwavus.pdfIn PDF document text
    • https://robindayne.com/ckfinder/userfiles/files/pevurubuwox.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/fabglpebkamrgvrr91skqtgadh/97244744455.pdfIn PDF document text
    • https://efficientinfocomm.com/ckfinder/userfiles/files/tevozosomasinexoxevizibid.pdfIn PDF document text
    • http://plenaseguroseprevidencia.com/fotosempresa/files/23091029958.pdfIn PDF document text
    • http://uniquecharacters.com/upload/files/bobinumimapapake.pdfIn PDF document text
    • http://hondatayho.vn/images/ckeditor/files/fexaromatator.pdfIn PDF document text
    • https://jaurrieta.net/USERFILES_JAURRIETA/files/1516156408.pdfIn PDF document text
    • http://sistarelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bipesemogigoxejupufag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=picsart+in+pc+windows+7PDF 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_off0000d828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD828 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f03a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03A 17732 bytes
SHA-256: 3dc4f963a4537951f8378ac160c50c11e39441b2878e2c2736e4524d70b87123
font_02_sfnt_off00011e6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E6F 10464 bytes
SHA-256: b64eb135160ed0024c76f9f4b83a9e14d87a9f78c7fd21a46d6fe25e13f241e7

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