Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e5ae5cf20351576…

MALICIOUS

PDF

90.8 KB Created: 2021-09-05 01:15:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 3bd4fe7daa9492b572bfb6ed0bbefdd5 SHA-1: 14f34b041e578b4635b6c45b8c66d9514e7627b6 SHA-256: 1e5ae5cf20351576875600fcd8dfadd180ec08c8b84cd4e79d0013c7b7cfb8e1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document functions as a link farm, directing users to numerous potentially compromised WordPress upload directories and other disposable hosting sites. While no scripts were explicitly extracted, the nature of the links suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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/16111a385d6493---ruzilubasa.pdf In PDF document text
    • http://jingyilin.org/uploads/file/35708608808.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2b2fcdafb---10546268838.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0050e312b---18990334320.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/db59b2ec749903603dff43029980669c/sazifibajajos.pdfIn PDF document text
    • http://csc021.com/userfiles/file/20210628014154_ksp66g.pdfIn PDF document text
    • http://gptools.net/userfiles/file/68076997171.pdfIn PDF document text
    • http://loaamtran.vn/files/usersfiles/files/fobofumijugumosunijodunel.pdfIn PDF document text
    • https://ht-cooling-j3t.com/contents//files/gatisomeba.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d47ea1bfb67---50171992316.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/19198419108.pdfIn PDF document text
    • http://hzdshg.com/images/upload/File/xapos.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/fisabivun.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/denaw.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a60fb7a4b37---pufexudaxelebulasaxidadej.pdfIn PDF document text
    • http://ingmontagna.com/userfiles/files/wadawowu.pdfIn PDF document text
    • http://abwingsbuffalo.com/uploads/files/komevuxozite.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/35cc36affd1713fac435d53770e187d2/fivizakisegasexipasiled.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/43133453188.pdfIn PDF document text
    • http://tcsm62.org/uploads/news/file/lopinasopunogomof.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160764c007da0f---wusovevosivapege.pdfIn PDF document text
    • http://tid.vn/upload/files/niguwajodirufawunu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=rdbms+concepts+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_off0000fedd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDD 18336 bytes
SHA-256: 3868e75a980bfd63e18a125c6bb982746fa787b1b59df261355c7142f190f1ce
font_01_sfnt_off00012dea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DEA 10568 bytes
SHA-256: 1e3cd22b9916df88688d97dd5a3a9deab4da3786542fecc89ab7367fb585ca7c
font_02_sfnt_off000145cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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