Malicious PDF — malware analysis report

Static analysis result for SHA-256 d53394fd329353e8…

MALICIOUS

PDF

80.8 KB Created: 2021-09-19 20:51:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 39b431145c49aa780ee949f67ae82de8 SHA-1: 77015d81da6f09b06c774ab46d525d39e1bcaa00 SHA-256: d53394fd329353e8e4e7fd9bea3e0f0d0164ba6f0e566c898ccc196c2e502d24
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and link farms pointing to various domains, many of which are associated with compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of multiple external links indicates an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 https://drafthe.ru/uplcv?utm_term=awaken+the+giant+within+you+pdf PDF link annotation
    • http://hitelesen.com/userfiles/file/fadiliseronekezesetunofe.pdfIn PDF document text
    • https://coastalstudio.com/images/main/file/60892514841.pdfIn PDF document text
    • https://albizy.com/ckfinder/userfiles/files/vikuwifedefedajubisejexup.pdfIn PDF document text
    • https://pensiunea-escape.ro/ckfinder/userfiles/files/51168903113.pdfIn PDF document text
    • https://jasz-pap.hu/UserFiles/file/bijeb.pdfIn PDF document text
    • http://autovoda.ru/upload/files/54887486480.pdfIn PDF document text
    • https://delcinfo.ru/img/files/files/37726065225.pdfIn PDF document text
    • http://eldorautomaticgates.com/UserFiles/file/24315356001.pdfIn PDF document text
    • https://innovativallatgyogyszer.hu/fileok/file/gopoxoresenupugopatiki.pdfIn PDF document text
    • http://3t-t.com/User_File/UpFile/file/20210904070006_d290aWd1c2Vwb2ZpZHV0.pdfIn PDF document text
    • http://vina2002.com/uploads/files/xokedomomibigubenuvewum.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/7df52652ba36608f2f3c95e9258c03fb/6855861288.pdfIn PDF document text
    • http://www.anapharmata.hu/ckfinder/core/connector/php/files/nefalolikitori.pdfIn PDF document text
    • https://agri-mal.pl/userfiles/file/xefalamozafolitunozajupe.pdfIn PDF document text
    • https://mfdesign.hu/files/file/xovoregawe.pdfIn PDF document text
    • http://snuhonors.com/userfiles/file/24184485165.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614496943fb3d---domeranaki.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec312a604d---kofabiwidinubomirokofo.pdfIn PDF document text
    • http://cegled.varosom.hu/userfiles/files/sasifiwobubobude.pdfIn PDF document text
    • http://zimmerei-possert.at/nasovarafoma.pdfIn PDF document text
    • https://flardochform.se/userfiles/file/niladogijipazuto.pdfIn PDF document text
    • https://efckrakow.pl/userfiles/file/zegenesi.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/dbdff40e9b83f5c6757067421fc6ee66/12406668897.pdfIn PDF document text
    • http://namdolove.com/FileData/ckfinder/files/20210906_2EC0B470E5C1A10F.pdfIn PDF document text
    • http://yujinpharma.com/upload/files/xajuvofabeguw.pdfIn PDF document text
    • 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_off0000d54e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD54E 10836 bytes
SHA-256: daceee593607cfe0d9ac9e208833af63de0ce29884f6255e8ba92433f14983b8
font_01_sfnt_off0000ee26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE26 18440 bytes
SHA-256: 9044fcde362d973c3772a287de7c49f51a3018c1e818e74317c9c7c893c387e9
font_02_sfnt_off00011db1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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