Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f1faa29f7a2c1b2…

MALICIOUS

PDF

72.0 KB Created: 2021-05-25 05:35:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d817a162a5cbb19032bc7903ef961611 SHA-1: 7df76319d3f3a2092ccf773d4adbb52dd6d79a50 SHA-256: 5f1faa29f7a2c1b23a3a0aaa3f0312bb1442e396fe0344a80d0af279fefc8fcf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains a link farm pointing to compromised WordPress upload storage, suggesting an attempt to host malicious content. The document body, though heavily obfuscated, appears to be a lure related to a fireplace manual, likely to trick users into visiting the linked malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df432bc496---logisosixikaxi.pdf
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16097882997f76---52278183636.pdf
    • https://securitydm.com/slicice/file/ziranop.pdf
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2b597f8c2---vusumimogusenifixabof.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ab685fd34aaddd72fb4fa01e4a27ecab/7347725164.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607030dbf36e9---54612639100.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1609b00c885127---welimavetebepovoxopixo.pdf
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/16070bf0a3aae4---felodokerawozujovigag.pdf
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/9dbb7c79b1a13f31a36cef8741657284/famawewesaxaxexunerisugi.pdf
    • http://softwarefactory.nl/images/file/91923053491.pdf
    • https://binarbaidequipment.com/public_html/userfiles/file/52263251100.pdf
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/cb0e380c7451dc20b03c63b52e511b4f/kabadurodugugel.pdf
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/0039ab24093ddd0e9db4101fddd346ae/34464739981.pdf
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/usbh6prqvlp615bs3lpr9n0esp/gekumepuwaxam.pdf
    • https://moto-trend.cz/public/files/fck/file/mojozesowudojepokipono.pdf
    • https://lasanisports.com/files/binariwiwajemagalonudot.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089e28eb7af4---numezefetelodozajiru.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=heatilator+e36+gas+fireplace+manual
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dad9.bin
6fefe4f99a47f2b208a4363925a350bd9e106fbf9aaecdfba0b5e2b316961281		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD9 5612 bytes
font_01_sfnt_off0000eddf.bin
69721cf17951cfb0269c9d790d9c9698764d043d4fac36ae205e6b1c95d59772		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDF 10860 bytes

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