Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1ed027bdeaf7675…

MALICIOUS

PDF

80.2 KB Created: 2021-08-29 22:47:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7a3fc3fb91e4e7f0be6475e29fea8cb2 SHA-1: a3963e03d07213ea8cf8dd6d8b3ddc925e749592 SHA-256: e1ed027bdeaf767595796afd51690807adee4bffca51eaa0d1a649b8ed437064
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting. The primary purpose appears to be redirecting users to external, potentially malicious content, rather than delivering a direct payload within the PDF itself.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • 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://on-video.com/movies/movie_data/file/naranexunutobakasabekel.pdf In PDF document text
    • http://www.chatanakonci.cz/userfiles/file/bijoforunimozazale.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9edb05f84---44794696818.pdfIn PDF document text
    • http://onishi-kyosendo.jp/archive/gomenusijefusixuzi.pdfIn PDF document text
    • http://www.asap-recruitment.net/upload/file/pedexewuzoradobugesifuw.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c39cf7300a2---bulerugafivagesabevip.pdfIn PDF document text
    • https://arerp.kr/data/file///33890927119.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bd84ee2f820---junab.pdfIn PDF document text
    • http://cadeco.com/testingsites/advantage_aviation/assets/media/file/zogabuwo.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160870cb7e68dc---bokebupabezuba.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a22e4d917---74681276505.pdfIn PDF document text
    • http://baovephuongtroi.com/vietkiendo/upload/file/lutotajefexomafolesupu.pdfIn PDF document text
    • http://cesnek-vysocina.cz/UserFiles/File/walepezefopujikavejofa.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160969b0f31fbb---89298990053.pdfIn PDF document text
    • http://upoart.com/ckfinder/userfiles/files/81985301208.pdfIn PDF document text
    • http://jonkmp.nl/img/cms/file/79648342980.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdee05cc7ff---limapanebiv.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/1e3f69ff90c2fd24da9178e0e6f509ea/73310736579.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/de6079e20e505245aef3624c015075b7/5760133713.pdfIn PDF document text
    • https://giga-tronics.com/userfiles/files/zudonaf.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160abda3ae9937---21429148209.pdfIn PDF document text
    • http://simonkuehner.de/gfx/userfiles/files/4078903413.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/3m915rcvuekp5g20nnk9smmhhl/zagorusazufabajufokikaj.pdfIn PDF document text
    • http://anhopphat.com/uploads/files/6812415247.pdfIn PDF document text
    • http://alacarte-grafik.de/userfiles/file/fixusefanirepixebif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=call+of+the+wild+boarPDF 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_off0000d5a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A2 10436 bytes
SHA-256: 409daae956b8ed082ff0a9c45256c132c82b0a5990a529f4a773419b17e6148c
font_01_sfnt_off0000ed76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10588 17496 bytes
SHA-256: 405ba096d9ed87d6d311ecdc3722a85ca811558df79031c300d720c0d71d4b81