Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dc623ad624face9…

MALICIOUS

PDF

84.8 KB Created: 2021-07-30 12:02:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1346428acd58b5567a5adeb49e222214 SHA-1: 61764cbc72613f9f856e611548433c80c7bf5882 SHA-256: 0dc623ad624face9ad0c2e9c282c84a598e5d1efc7876cbe2d44b5db6c1bc12d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains a link farm pointing to compromised WordPress upload directories, suggesting it is part of a campaign to distribute malicious content. The embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/16091303c98b36---pusakapokes.pdf In PDF document text
    • https://vieclamxaydung24h.com/upload/files/78246400633.pdfIn PDF document text
    • https://oteaexpert.fr/cite_imgs/file/dexativalozoxupubupe.pdfIn PDF document text
    • http://altus.pl/userfiles/file/77131531114.pdfIn PDF document text
    • https://farmaciasacoor.com/site/upload/file/189487629.pdfIn PDF document text
    • https://aurorabersinar2.com/contents//files/xapesakarajamiporadagi.pdfIn PDF document text
    • https://sharadsangam.org/UserFilesTwo/file/dumopu.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092ed8033881---wofedurajumev.pdfIn PDF document text
    • http://danburyhighclassof1961.com/clients/b/b4/b42d7d7907ff1a67dd6fd366dd3c6775/File/33166653929.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/3ji8f4nt9duvquepan2r8t22ta/82891034046.pdfIn PDF document text
    • http://trans-serwis.com/userfiles/file/19048803752.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bce0a90e47b---berixejoxagig.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16086422001344---fugijizuvaxipimonepimak.pdfIn PDF document text
    • http://bjaimama.com/data/upload/2021/07/file/202107090554074068.pdfIn PDF document text
    • http://jar-ted.pl/file/direwepogedovowam.pdfIn PDF document text
    • http://charivne.info/images/file/pezojunepiniwi.pdfIn PDF document text
    • http://aliglobshop.com/userfiles/file/varugav.pdfIn PDF document text
    • https://hosvagyok.hu/userfiles/file/91237185377.pdfIn PDF document text
    • https://paperland.bg/uploads/file/27369987348.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160958b5f25b99---18365975644.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/8545752176.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9cd29afe7a---metupezajovawemimuv.pdfIn PDF document text
    • https://laser123.com/geektic/files/26629297158.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=telugu+academy+books+for+intermediate+1st+year+botany+pdfPDF 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_off0000e588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE588 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9F 11424 bytes
SHA-256: 21458ba021eeaf9a91b840552e55fc38a7c9945020f6ae0acb6d3768171cb4d9
font_02_sfnt_off0001183d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1183D 16968 bytes
SHA-256: 187a5e7a74c86f911967fb30e51c23aae3782a2feef582b17504ccc4a933068b

Open this report in the interactive analyzer, or submit your own file for analysis.