Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c252a99843d2598…

MALICIOUS

PDF

91.8 KB Created: 2021-07-01 13:09:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 200c58fd3f367f2a5905a1ffa19af00e SHA-1: 4da1aba798e343fbe6d3a84c6f7c960aae152f7a SHA-256: 1c252a99843d2598e15b8cb1daf32880c6fbf783e78539a4aa403b86a29b3115
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://garglob.ru/uplcv?utm_term=chinese+crested+chihuahua+puppies+for+sale PDF link annotation
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076f60e12abc---wukinawirupamudifu.pdfIn PDF document text
    • https://mimpishio1.com/contents//files/76137141993.pdfIn PDF document text
    • https://btegypt.com/file/givoluvetoz.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/76968842117.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16097e0c0af1b4---poriwuvusawezelanadolavas.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/87108399774.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b24aeb4e1---zobokoxazobexapeka.pdfIn PDF document text
    • https://tonitomov.com/picture/file/mobawiwikezusizagemelif.pdfIn PDF document text
    • http://pettwayfamilyreunion.com/clients/39389/File/nowojixe.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aac1ee98be9---59356211412.pdfIn PDF document text
    • http://cioccolatogallucci.it/userfiles/file/pepip.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/bovaketelenuzumepo.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/cg08928j49st6gb6a417vf7h4o/fexerasisuf.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d8b078832---74368008583.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607176657ba77---76915530128.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/t1ft2b6mh4jbm2sncdj0m8cnu6/58520226044.pdfIn PDF document text
    • https://mmgrowersg.com/ckfinder/userfiles/files/bozogekosuf.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/2qoehniuorp773tqfbjb2mtd9o/32819503662.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6fa7619c0---53691424351.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af8ce1d147b---52393201787.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a3395ce1418---65279518701.pdfIn PDF document text
    • http://apcmagon.com/userfiles/20202012647.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/qd4ak4s64teb86eidmus7dllj6/90046708825.pdfIn PDF document text
    • http://highlandlynxotic.com/clients/7/73/73cf6ae24f8ea70eb1cbac1dff6b0f9e/File/xarojuxi.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/sogelugizajuxode.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/a28390b9b26543b1581267d431cf415d/3102007026.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001037b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037B 10848 bytes
SHA-256: d0154b57d6fd9188c02bb92e3dd7ba7d7fe6d5e95bac799f97b6f37023340251
font_01_sfnt_off00011c76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C76 16808 bytes
SHA-256: ed4871b85b9ad5a93b68a04f3da7593d6cdda741d8fa4a8fb3857ff74ccc81b2
font_02_sfnt_off000147f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1