Malicious PDF — malware analysis report

Static analysis result for SHA-256 479f2e958a6f94d8…

MALICIOUS

PDF

80.5 KB Created: 2021-06-30 22:46:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 2d0b86599842949846d692ec4e77c06f SHA-1: d54234e9ebfa9de0c7b9d0484ea41bd62313f88c SHA-256: 479f2e958a6f94d8788df2994ac70973b93e9533f898c3f6f184914b14be08a3
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a callback phishing or tech-support scam, as indicated by the 'SE_CALLBACK_LURE' heuristic. It contains numerous links to potentially compromised CMS upload storage and disposable hosting, suggesting an attempt to host malicious content or redirect users. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a malicious intent to deceive users into contacting fraudulent support or service providers.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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 http://www.saito-ken.jp/userdata/file/xibomikidifaleziwiz.pdf In PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083a64cc7046---wawipa.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/61efe11763dfb952950054eea4a4a56f/85095330071.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bfded78e678---jilekup.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609edb0fac253---72483575526.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-4-29/20210429010734775764.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078c7a6c3b8c---rixuzabelanerakop.pdfIn PDF document text
    • https://rumahbaruku.com/contents//files/dozizubovuziserifu.pdfIn PDF document text
    • http://tribo.kz/userfiles/File/49361641569.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c63143e5758---vitimixajolewa.pdfIn PDF document text
    • http://gourmethousemacau.com/UploadFilesfile///34401138504.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/4f035903ef32d80e0d0c2866fa28cc9f/71069815843.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160accb199fd0b---50952146174.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/kkjvp2eqcer8748kddig4mql4u/vigujifusajusedi.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1cebc1f32e---logatawudugixepilotef.pdfIn PDF document text
    • http://avs-market.ru/admin/ckfinder/userfiles/files/xijulemutew.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a05f2f8a20a---92811227494.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/eud731c9cr2ci33g6t2vf1s1n4/35027390352.pdfIn PDF document text
    • https://markeishahall.com/wp-content/plugins/super-forms/uploads/php/files/6c1eab3421401cf0d5c177c84ff2c5ac/mumexerejetu.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/d075e75ff9bda7becfed3d8757c842b3/93416115727.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160b4167b19175---9535582664.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/mls02h1tku654n40qc048f8lj7/gufaz.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/3s3kd49ific67ebiiri3ajo070/tanalut.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/g91q3k48kut3dqer8686up8iu6/92501472581.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/b0oiqlgmsnt3blp6gjiash5t6e/rixoloxamiboxejerekegutu.pdfIn PDF document text
    • http://occahomesearch.com/userfiles/files/60966489383.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=how+many+ounces+is+40+poundsPDF 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_off0000d7f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF003 16544 bytes
SHA-256: 87af59af310b2e20527b6dc53db90a5def7818f0cf6289aa72c084b06bcbf19e
font_02_sfnt_off00011b13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B13 10924 bytes
SHA-256: 7cf51a1f6b1ea3f87642ba9046d2f31a198d88735b2593ccb4fce1725dd9dccc