Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef1ea10f0452f8c9…

MALICIOUS

PDF

89.6 KB Created: 2021-06-26 00:22:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 429a722b3793ce2b09a6cb570f31ec56 SHA-1: 71e4a2fd17d9b7ff33af8fa34d49abb63df4319e SHA-256: ef1ea10f0452f8c91ad72794ebe655932333d472da0f46229fb26f5e70f7ba07
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the link farm and the detection as a Trojan indicate a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/2c785809c2258725247fb92aecd8ecaa/ninadev.pdf In PDF document text
    • http://amexeuro.com/an3_Uploads/file/40906943069.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160af45d3d5d88---83717607915.pdfIn PDF document text
    • https://baongochoa.com/upload/file/wivepi.pdfIn PDF document text
    • http://mientrungpetrohotel.com/users/files/pizuvufuraxenifuxuvumija.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/99411521941.pdfIn PDF document text
    • http://www.puhito.hu/uploads/35759577814.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/8ec2300cf103986e6b51b3b3350ad375/mofukupitokopakonurali.pdfIn PDF document text
    • http://beateromer.com/bilder/file/lepajasifagofisazo.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ce9143fc0---doziwerufezaboworeso.pdfIn PDF document text
    • http://cmtsport.com/pliki/74635120124.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/779a4847595891366c6cca82240cab21/36804130779.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///xogutamubosakomiz.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/16077819779cde---tapumexupewoniserino.pdfIn PDF document text
    • https://citytrafik.nu/images/file/42111544696.pdfIn PDF document text
    • http://bearings-home.com/userfiles/file/fujojefonokifomulupotuxum.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/hqmvmrqjff6794sj43bk0q36p5/kurijifavudadiju.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071539f43ee5---nasazada.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bffc68387cc---nofadufidasorubiziwelawi.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160947d7d83a8d---pokenajujariteboxorowiget.pdfIn PDF document text
    • http://barrybusiness-crm.com/ressource/devis-photo/files/pazakevewawefaxevidikojaw.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b44e310dd9---84825868502.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=russell+james+angels+pdfPDF 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_off0000faf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11302 17588 bytes
SHA-256: 12b93ff5a9afd2f41f9128dbe9a2506174f4a66f5b14ed2d11cf6f8632e608c2
font_02_sfnt_off000140ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140ED 10704 bytes
SHA-256: 167a71cd839b659e9250c64ec9d53aba449fa115b3774a81c87021075b3d4970

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