Malicious PDF — malware analysis report

Static analysis result for SHA-256 947e3e4002ab005a…

MALICIOUS

PDF

84.6 KB Created: 2021-06-30 06:08:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e780743f717e45c3c5cf8d6f93942f29 SHA-1: 0e0e366586069622e551bb8978fee6bb429f088d SHA-256: 947e3e4002ab005a27a7b87ce16ec6c2f6c252bb0fd16da62dacd99314b335f5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan distribution attempt. The file functions as a link farm, containing numerous URLs that point to compromised WordPress sites, likely serving as a distribution point for further malicious payloads. The presence of external URIs and link farm heuristics strongly suggests an intent to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078947a0f580---73372785652.pdf In PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/abe2568867c9cf26cef380c6684dcd40/44275297652.pdfIn PDF document text
    • http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/9717585308.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/14012931833.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/09e6c79d69b9d577518ba70d81f1d069/25280353088.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/losibewanepox.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/5de0b23229907ff267fbbe99efc86af8/xakuwimiloki.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/duseladomevibafuzofapa.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/4768ab28ae591bac9926a58a649d796d/tirivupoxobekirirenivakur.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/92387785040.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/74jmg4umk4pi56u1h3pisvppin/liwemax.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/d91d126a7718c8d3b10e0b9c68b63e8f/43211663156.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/50732182863.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/0mra8l39pijj2vvltfnr1mlpa5/88727014204.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/948d622f28ecc92c5ed69e821a4579a9/sugozipudigufib.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160734bb254e87---6515348310.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/wibiripezufopir.pdfIn PDF document text
    • http://capitaloffice.pl/fotki/file/vamolijod.pdfIn PDF document text
    • https://activepymes.com/pub/file/xuvon.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160860e2a02327---74147869430.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/c8mr8e3qq52d4e0kcrc2pqm1g6/biraduzalukeb.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160822d8640586---30463996873.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=laborious+meaning+in+punjabiPDF 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_off0000e8ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000100e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E5 10780 bytes
SHA-256: 31ce71f87ec3b37a5d9dd57dd6247df25604b32a72767e5691482031f0f24bb7
font_02_sfnt_off00011969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11969 16580 bytes
SHA-256: 7cec6f00b848243f4f0732113fa32114dfe822ffa72475c7969f337d2d8abb88

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