Malicious PDF — malware analysis report

Static analysis result for SHA-256 69f370b8796c8bab…

MALICIOUS

PDF

84.5 KB Created: 2021-09-17 12:07:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a9cac1d9be31727c5c21bc7dcb05da23 SHA-1: 86b1d6c0e4d814f01162be9ae750a6c8d81896fc SHA-256: 69f370b8796c8babab50dc05b5a1025011c9697108a49c003c1840a2d7eb9e54
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm, with many URLs pointing to potentially compromised websites or disposable hosting. The embedded URLs suggest an attempt to redirect users to external, malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://strongpointmarketing.net/userfiles/file/parababowupeloxa.pdf In PDF document text
    • http://remont-elektro.eu/archiv/file/76773992751.pdfIn PDF document text
    • https://obermeyer-modemarkt.de/upload/file/jedarimukija.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/b18a82a67cddfb894af1c196184a9568/mugimuvowib.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/tivazagu.pdfIn PDF document text
    • http://skpizzasubs.com/uploads/files/ragomorawevego.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135233cea1a7---kozifekeloga.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613f355e78f7c---13724764358.pdfIn PDF document text
    • http://vigen12.com/userfiles/file/kizofekamejinowurutusi.pdfIn PDF document text
    • http://skalamatbaa.com/userfiles/file/kafumeruxivivis.pdfIn PDF document text
    • http://pandoraecza.com/genelresimler/file/mefutifajas.pdfIn PDF document text
    • http://purplebyanki-com.bvirani.com/ckfinder/userfiles/files/gozodonotijib.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/68174756164.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/54543850dc7e31a7dcdebf4f6f987c84/94216362041.pdfIn PDF document text
    • http://bukvoznaika.ru/ckfinder/userfiles/files/teposusuvetipagu.pdfIn PDF document text
    • https://10kshot.com/customerinterview/ckfinder/userfiles/files/jufuruzoxobuvewerat.pdfIn PDF document text
    • https://movimientofamiliadejesus.com/images/uploaded/file/40212244924.pdfIn PDF document text
    • http://musthighschool.mn/ckfinder/userfiles/files/86225100212.pdfIn PDF document text
    • http://burragebrothers.org/demo/jolie/beta/userfiles/files/18963302938.pdfIn PDF document text
    • https://okud-istra.hr/userfiles/file/9224787056.pdfIn PDF document text
    • http://baiduvpn.com/upload/files/litimeg.pdfIn PDF document text
    • https://hamzsabegi60szallo.hu/UserFiles/File/34557783247.pdfIn PDF document text
    • http://autoscuolecasetta.it/userfiles/files/rinuze.pdfIn PDF document text
    • http://kovove-ploty-brany-zabradli.cz/UserFiles/File/fopuvusewin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=pokemon+game+ppsspp+downloadPDF 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_off0000e0e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E5 19508 bytes
SHA-256: 098140614892df1938afe3514bc88c8112d0ded41d96c3f9af1b1c734201883e
font_01_sfnt_off000113e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E6 10624 bytes
SHA-256: 95616f8ac6dda44d693b43b0a1c1e37917059b6107ad388b9af127c0d1452321
font_02_sfnt_off00012c15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1