Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1b3e728160b3d1e…

MALICIOUS

PDF

163.7 KB Created: 2021-07-30 05:54:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: a05c58c4dada108c27ea14fda6cf1e2d SHA-1: 61cb62dd44cb5dfe8b37dc6ff32b283688bb804e SHA-256: e1b3e728160b3d1eac676105ee3f4fbd374a9f6a7c0e2879cd15b35eabeab82c
216 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload storage and disposable hosting, indicating a link farm designed to redirect users. Heuristics for 'Payment redirection / bank-detail change lure' and 'Callback phishing phone lure' suggest the intent is to trick users into fraudulent financial transactions or support scams. The ML classifier and ClamAV detection further support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9466

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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 https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/f7040f841d144ecfd689842121d6963e/gusonupujipufuz.pdf In PDF document text
    • https://maplesservice.com/wp-content/plugins/super-forms/uploads/php/files/8dd7f802c458a6fef060d1766f985aeb/66158518505.pdfIn PDF document text
    • http://componentcnc.hu/uploads/ckfinder/userfiles/files/57384586928.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/78193433922.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/531fa97188c1417b4abf8e48467994e7/xalodoxuruwulok.pdfIn PDF document text
    • http://hifitness.hu/userfiles/file/nepoxakikezinuxixeriru.pdfIn PDF document text
    • http://digitalpolicycouncil.com/imagenes/file/96701015923.pdfIn PDF document text
    • http://sportsgarten.com/editorData/file/57874611411.pdfIn PDF document text
    • http://orikon.net/Images_upload/files/kizawekaj.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/tmf766mr1fisqosee3mftlpnu9/64753559102.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b26001985f6---25619490670.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/bobetome.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607790c79aa95---refolawalebagabinebevalu.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/nmmnvh2kcm9v67nvkdeum124h6/zunew.pdfIn PDF document text
    • http://harc-ias.vn/Images_upload/files/25841555356.pdfIn PDF document text
    • https://aonetreks.com/uploads/file/99745160684.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/561766f867c3fbc26489bafea29061d5/rovafepijonitilatol.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/88876517109.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/29e32e46a6574fa529d74f258c72d39f/11851426530.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f7132f451---80275250144.pdfIn PDF document text
    • http://nuk-amro.de/userfiles/file/magekiboxalifu.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/a04dc312f316609b3bff81f9bf069524/gejafexonusobasab.pdfIn PDF document text
    • https://bhalakusari.com/uploaded/ckeditors/files/33646671881.pdfIn PDF document text
    • http://tdfinalists.ca/clients/43449/File/826574764.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eba69f28e2---56281908152.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=how+do+i+claim+hst+rebate+on+new+housePDF 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_off0002205d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2205D 17552 bytes
SHA-256: ee5be4aea889744803a68e25952ff8d77ce36c2cb98b2fa7209b7e5285de1d21
font_01_sfnt_off00024dcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24DCF 10952 bytes
SHA-256: 31f629d99a101f69d379ffcdbe61b6a344ac42f007d9912cfc41a37f93362749
font_02_sfnt_off00026700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26700 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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