Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd7e3c6b19af568b…

MALICIOUS

PDF

96.8 KB Created: 2021-07-07 16:20:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 83adf812fbbda2adf2355d9ef0e6360a SHA-1: e9d5ba3641526157e5f03604ca1559fac50fffd1 SHA-256: fd7e3c6b19af568b1e7f3bd027e20b76636106f81645b38594692f1240a1c8cb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including ClamAV detection and an ML classifier. It contains numerous external URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to lead users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://irlanc.ru/uplcv?utm_term=states+with+most+retirees
    • http://studiotecniconuti.it/userfiles/files/texuferow.pdf
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/71f4971d41952b1ec8e7fccc2902e71e/12077144815.pdf
    • http://www.nomorcantikjoss.com/file/xuderavipaz.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d95fff93ac2---gemeravilufesiviwuxogi.pdf
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b201646777c---92931286673.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/d06b84162d6ab90591d533d245d83497/4146436462.pdf
    • http://asianmosaicnyc.com/userfiles/file/berifibuvapowosalun.pdf
    • http://springhs1988.com/clients/a/a7/a70db2535ed58991dd9724faf9b165d0/File/zuxofuxolu.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/16091f91674091---46613287346.pdf
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/nesosazusofoxe.pdf
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/0f58e16486dfdcc393b0728607db140a/26506027154.pdf
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/4cfe6d6841e0b18f01066ada0a8b9b1d/vozelejegipozemiluzav.pdf
    • http://baigeleather.com/userfiles/file/ratala.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/716ba8afc5d1769bd14e64afa03a1ab7/46009774428.pdf
    • http://accessiblevehicleservices.com/userfiles/file/42976270512.pdf
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/4f9fca8ab48a318015c6bfb9514694b4/namokikaxazivoxawe.pdf
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/b7f8d96bb7224ce0ca2336025cb5539f/54494107213.pdf
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/3f23e2fd051d348ab790971a6c93f8f0/73858969053.pdf
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/d30uvvhubvn023d19huvactqm0/kedalusosave.pdf
    • http://prinsart.ro/uploads/files/48583224538.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d123b787a9---zodojubanadoliwivefisun.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160dcdd90499d2---romurirusod.pdf
    • http://polipack.ru/content/file/zujobigagawozezowuruv.pdf
    • http://sahamit.net/userfiles/file/lipirubujekavewoliwu.pdf
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000118e8.bin
799d1b2e75315c525bb65e55748decd8529882afe1e60433da1b322feb414edb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118E8 10384 bytes
font_01_sfnt_off00013074.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13074 16792 bytes
font_02_sfnt_off00014886.bin
316cad299e9c410e0e28091569b96574b4d811d211074838b17e2a22397b17b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14886 17648 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.