Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bc0b6463aa0b82a…

MALICIOUS

PDF

73.1 KB Created: 2021-09-09 00:16:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 92e874666eb45d49bb234b7d233bdf54 SHA-1: 14ec098c789e76a5b3fe8d2bba054e943e64ffd6 SHA-256: 2bc0b6463aa0b82a3d53f93f9cee1e2b7a729aab65a5a14a36deeba477089edf
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of numerous embedded URLs, many pointing to suspicious domains and structured as a link farm, suggests an attempt to redirect users to malicious content. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to exploit vulnerabilities or deliver further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lmleadmanagement.com/userfiles/files/91132598457.pdf In PDF document text
    • https://voyageaventurenepal.com/upload/files/59810440867.pdfIn PDF document text
    • http://rkenterprisesonline.com/FCKeditor/file/47947239749.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134a7f4ec22d---sitijedogivewupemuxijufi.pdfIn PDF document text
    • http://a2kat.ru/userfiles/file/sajomipupi.pdfIn PDF document text
    • http://angelofthewinds.org/ckfinder/userfiles/files/fusodomupevojonupixi.pdfIn PDF document text
    • http://centromp.it/userfiles/files/83445335032.pdfIn PDF document text
    • http://kondicionery-dzerzhinskij.ru/upload_picture/file/82332852342.pdfIn PDF document text
    • http://dydlhx.com/upfiles/file///70228797470.pdfIn PDF document text
    • http://abc-tel.ru/data/File/lowido.pdfIn PDF document text
    • http://urbancollab.com/userfiles/Proj_Name/files/22234107684.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec3e2b13e8---33633940918.pdfIn PDF document text
    • http://kirakuramen.com/uploads/files/winuraweguverogikogerozoz.pdfIn PDF document text
    • http://parbatsamajjapan.com/img/files/files/93167973333.pdfIn PDF document text
    • http://chpcentre.com/files/file/gogagalezalereraxus.pdfIn PDF document text
    • https://pre-www.bridge-academy.com/uploaded/ckeditor/files/kulodanelowikan.pdfIn PDF document text
    • https://lanna-flyingclub.com/ckfinder/userfiles/files/nararawimepakukamowoluvap.pdfIn PDF document text
    • http://rem-proekt.com/f/file/depexikoxudito.pdfIn PDF document text
    • https://cvconstructionsgoa.com/pharma/admin/userfiles/file/28977342824.pdfIn PDF document text
    • http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/xukuxesubu.pdfIn PDF document text
    • http://kirakuramen.com/uploads/files/toxixelekarurajuko.pdfIn PDF document text
    • https://doosradashak.in/ci/userfiles/files/68330210939.pdfIn PDF document text
    • https://koltoztetes-szallitas-lomtalanitas.com/ckfinder/userfiles/files/rakuxozokuzodisevo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=fancy+pants+flash+gamePDF 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_off0000baf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d30a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD30A 10708 bytes
SHA-256: 3d967e1bbcbf29c3be64be72f02018fd1f31a8a938876322a5fdb47bf295f1d0
font_02_sfnt_off0000eb82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB82 16980 bytes
SHA-256: daa0f888b6a3a0a3e1772879000fef59fcb0aca09a0f6be3975ea15e69d3b701