Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba168c866a8975bb…

MALICIOUS

PDF

83.1 KB Created: 2021-09-16 05:28:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 50b31b6d376d3371507e14742884ce81 SHA-1: a9d4f6ec793b262f1a77a2016c1a65405ecfe7a1 SHA-256: ba168c866a8975bbf0932e5ac53b278648926d5dcd7bf510e3efbeb0bc0987c3
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm hosted on disposable domains, a common tactic for distributing malicious content or phishing pages. Heuristics indicate it's a callback phishing lure, suggesting the user is prompted to call a number related to billing or security issues. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or a trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://trevorhannant.com/54890129825.pdf In PDF document text
    • https://yomadesign.com/userfiles/Proj_Name/files/pivitomiwidobokikar.pdfIn PDF document text
    • https://ibrahimkoc.com/images/Media/files/ludaluneniwavixorinodopej.pdfIn PDF document text
    • http://stroyindustry.com/userfiles/file/99092403771.pdfIn PDF document text
    • https://adetexfoamgroup.centralcms.cloud/galeria/files/44184044335.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/f0316e4c4b9656f5dc2a16a310aab264/bekaxopulowamujigik.pdfIn PDF document text
    • http://steelbo.com/uploads/admins/u0/files/20210905105622.pdfIn PDF document text
    • https://juvelyrikoscentras.lt/Files/file/sotubafiralerenelivebi.pdfIn PDF document text
    • https://yellowmangocafe.com/userfiles/file/53724813600.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16142976c22184---jevomitawekeder.pdfIn PDF document text
    • https://medius.sk/userfiles/file/87556590645.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/3899cbe2ab9d477a82e72e4e893d07eb/37562472625.pdfIn PDF document text
    • https://girl0229960192.com/upload/users/files/bepovadebikovigizudodoj.pdfIn PDF document text
    • http://p-jtech.com/userData/board/file/buwuxesulajovitiv.pdfIn PDF document text
    • https://www.champagne-auge-dascier.com/ckfinder/userfiles/files/70501290605.pdfIn PDF document text
    • http://happysmilecard.com/uploads/files/fipofusarojakevaloxufazam.pdfIn PDF document text
    • http://suliaox.com/v15/Upload/file/2021911919536726.pdfIn PDF document text
    • http://guowangcable.com/d/files/76488558880.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/ruxebojaxirugab.pdfIn PDF document text
    • http://camdohungdung.com/upload/files/89461420488.pdfIn PDF document text
    • http://33podarka.ru/pictures/files/gulanafamutukotoxude.pdfIn PDF document text
    • https://asiahealthcaredentalcentre.com/ckfinder/userfiles/files/xisawisuwewakofutaji.pdfIn PDF document text
    • https://sinaia-vik.com/admin/fckeditor/editor/filemanager/connectors/php/file/38783981430.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=pickup+truck+robot+mod+apkPDF 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://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_off0000e406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE406 18192 bytes
SHA-256: cd47a3d3da923ec113923482ede46d1fa2411faa3e066d20684a2283b9567f75
font_01_sfnt_off0001132b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1132B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B42 10556 bytes
SHA-256: 1f3da39bdabd25cf8e8924cdc4bc14df867c9b5f30a3ac252b650a1cc5aaa9e6

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