Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3e29bde6e45a717…

MALICIOUS

PDF

83.7 KB Created: 2021-09-21 23:29:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 35beabbb8292aa434a3ab026ae36ae27 SHA-1: fa97f6ca6fdbbcd766eef1780dda74dd874f5e88 SHA-256: e3e29bde6e45a71714fcc9161bd60efc79ca8e088ede719cade6b92bdfac84eb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document contains a large number of links pointing to potentially disposable hosting, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the nature of the PDF and the embedded links strongly suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://buddhaart.in/userfiles/file/56108858758.pdf In PDF document text
    • http://www.pattyn360.com/upload/forum/files/77016449467.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/vizerewekivimuviture.pdfIn PDF document text
    • http://luchetti.it/userfiles/files/6645888671.pdfIn PDF document text
    • http://fohow77.ru/upload/file/maliwowupebigolejawudinon.pdfIn PDF document text
    • https://thinkglobalcompliance.com/ckfinder/userfiles/files/nojedanovodusovekut.pdfIn PDF document text
    • http://poexali.org/static/image/_u/system/files/92861127028.pdfIn PDF document text
    • http://pnalog.ru/images/file/80999996663.pdfIn PDF document text
    • http://www.39koratmachinery.com/file_upload/files/47049315295.pdfIn PDF document text
    • https://samsungvrvklima.com/upload/ckfinder/files/radawutixejube.pdfIn PDF document text
    • http://www.psoealora.es/ckfinder/userfiles/files/96301612527.pdfIn PDF document text
    • http://inbond-cn.com/userfiles/file/dimoxemenukud.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/70058394928.pdfIn PDF document text
    • http://koala-al.com/d/files/dexogex.pdfIn PDF document text
    • http://www.themixchange.com/userfiles/files/jexaviwipesidubudopigop.pdfIn PDF document text
    • http://impactpluslearning.com/ckfinder/userfiles/files/61547969549.pdfIn PDF document text
    • https://iwanbim.iwan.co/userfiles/files/57852082380.pdfIn PDF document text
    • https://cihangirhotel.com/upload/ckfinder/files/64869254271.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/161368a5fb3036---ripelawi.pdfIn PDF document text
    • http://www.sandipmallick.com/fckimages/file/70010574759.pdfIn PDF document text
    • http://clinicaveterinariacene.com/userfiles/files/72361882117.pdfIn PDF document text
    • https://ysh.my/userfiles/file/fetusibepubupuzumuv.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140beffaf1f4---mujopuxutisuraxuvixug.pdfIn PDF document text
    • http://consoles-a-gagner.com/fckeditor/userfiles/file/74180288314.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=windows+8.1+enterprise+serialPDF 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_off0000dd89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD89 10792 bytes
SHA-256: 69c9383511e77760967f2fb14b745f7c8a3f90093d3e8be2ac0c63cb3fb6302a
font_01_sfnt_off0000f698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF698 19016 bytes
SHA-256: ff7c5e6d7c8f8c01bce66873a6ea2bb9f05669887bb44fd6c72932a78309f2c4
font_02_sfnt_off000128ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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