Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3f60884a9ad0c6f…

MALICIOUS

PDF

93.9 KB Created: 2021-08-01 14:07:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 32c90bc4f6e621e87c33ced6c038b7a3 SHA-1: e884931f0186dd5095304faea71bfa2a12abdfeb SHA-256: d3f60884a9ad0c6f303e3de5e96b284fec15331a83966db29be8138b0e53f844
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It functions as a link farm, presenting numerous URLs that likely lead to the download of malicious payloads, such as the 'far cry apk download for android' referenced in one URL. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a deliberate effort to obscure the malicious destination through a network of disposable and compromised domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pixomot.ru/uplcv?utm_term=far+cry+apk+download+for+android PDF link annotation
    • http://chapelguild.com/images/usr/35701834974.pdfIn PDF document text
    • https://xn--fct8ml6mwue.tw/uploads/files/rujijirinewamab.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/mubarobujuxagilovojebakuz.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///radigud.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/figeviwawerivo.pdfIn PDF document text
    • https://cordovajewelry.com/images/file/fegasibupujerazuveditodu.pdfIn PDF document text
    • https://sunpower.lv/ckfinder/userfiles/files/puzifujaxadidegifed.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160771b382ea55---rujoremumetogorit.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae5054d2248---pafidatijofuxuparinepij.pdfIn PDF document text
    • https://www.domosystem.gr/ckfinder/userfiles/files/sanejinur.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb25e1acb93---82763186440.pdfIn PDF document text
    • http://alwaditrading.com/userfiles/files/73737833028.pdfIn PDF document text
    • http://luingpyrex.cz/foto/Image/file/11253494342.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160816c6b00b0d---48378192260.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607b651e42510---21132258383.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/tobelezew.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d38ae18cf86---zovupapifobilajekazunu.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c91bb2f90e---wedosoxew.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b64fa7947e8---10658175627.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-7-13/20210713183651695453.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/6164d2cb6c2bd6eb123322c47461793e/tagobalonajuvetekugemod.pdfIn PDF document text
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c09c1a96884---13240332110.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C9 10484 bytes
SHA-256: fe068ef2bc477b4cb8cb1d596dd32d6169ee79ae07763aef84fc196f308da53f
font_01_sfnt_off00010ab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000122c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122C9 16384 bytes
SHA-256: 6bc4420bbfa61156f096b6f0725168f8601d7500e332933a6f3144c23c09a2fe
font_03_sfnt_off0001390f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1390F 18324 bytes
SHA-256: 53f2976a8e9fa902d6af1c4247deb8875798e4f9f58522712a0b9a5f4ffcf214