Malicious PDF — malware analysis report

Static analysis result for SHA-256 50afde6abd50cfeb…

MALICIOUS

PDF

93.7 KB Created: 2021-07-05 14:26:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 2e95c7ed9eb462e997c2ca53e814c5cf SHA-1: 080ffde2edff91a8ef41725585da2805ae03480e SHA-256: 50afde6abd50cfeb588570b30412af2692f69b140297080122c7101608e866ba
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a link farm pointing to various compromised WordPress sites, likely intended to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/0qpgv4hb22na3m9iv39voinenn/66669945471.pdf In PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/fa243f8d70c12342a2dcf5d06fff7c6c/14095066514.pdfIn PDF document text
    • http://agendaalzheimer.org/files/galeria/files/nugiwiletamerunuwo.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606e2a61ae7bd---gezowumogela.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d07ce0b1f1---37407453133.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/c0d5d9251279c8fea2ddfca0e29c6864/pewiwuwenap.pdfIn PDF document text
    • http://irths.com/upload_files/files/76413302637.pdfIn PDF document text
    • http://airfa.it/userfiles/file/wezojopixeganuzuvid.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/51757678944.pdfIn PDF document text
    • http://twfindia.in/userfiles/files/86193641496.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c985ee89c5---darekedimavonu.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160e0618b3ed0d---tunatolomimujo.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/96aeb8447213f703df058b494631f190/82419903981.pdfIn PDF document text
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/160820c80452c2---talinoguvaputoxa.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091dd43c5b3e---91017520920.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/tetubibazigomor.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089feeec7e0c---sabilanuva.pdfIn PDF document text
    • http://mynigaoe.com/upload/file/20210625181919.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/6f60376d356f987602fb300f7594e9bd/4267669575.pdfIn PDF document text
    • https://www.explosivo.gr/wp-content/plugins/super-forms/uploads/php/files/f758116e71e47a61391311b779bd332b/gumixobupawijulodofu.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/a9dbe4f739aaed8b4d76ee1965da9d7f/70670573669.pdfIn PDF document text
    • http://ilovechardonnayhills.com/userimages/80283273617.pdfIn PDF document text
    • https://cakkue.com/contents//files/12083599355.pdfIn PDF document text
    • https://cape-electronics.com/media/file/gunufazot.pdfIn PDF document text
    • http://marcobernini.it/userfiles/files/xoxetojupogofa.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/balaxosodegatiwebara.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=homily+for+the+third+sunday+of+easter+year+bPDF 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_off00010bdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDF 10964 bytes
SHA-256: d17a552d78f9b11cd20f57a2fcba55616b09167a69df3e6e8ae52b3c78977dca
font_01_sfnt_off0001250e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1250E 17148 bytes
SHA-256: 065f1bcaa0249b91ba66851739ec9f801371d83802c2348d2dff0cc1aedbc209
font_02_sfnt_off00015102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15102 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1