Malicious PDF — malware analysis report

Static analysis result for SHA-256 65102a3a9c4d5eb6…

MALICIOUS

PDF

79.7 KB Created: 2021-07-04 14:00:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: d2672f71d0f73bb3cdd9745aa1b1957e SHA-1: 1fbafa6846510b3d11230f8d97c79e7a9004bc9f SHA-256: 65102a3a9c4d5eb64063d2176c8bdcded6c88fbd493bc9acf0e9e9db66063b58
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document exhibits characteristics of an advance-fee scam and callback phishing lure, as indicated by heuristic firings. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content or phishing pages. The ClamAV detection and ML classifier further support its malicious nature, likely involving exploitation for client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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) 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://irlanc.ru/uplcv?utm_term=prime+minister+youth+loan+scheme PDF link annotation
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/otc8084ldtmeiu2cjt8i8g2n70/88203681945.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbabec75fa5---38576788482.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b47584d93---22305080149.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609119c38b9fb---dirozevajesone.pdfIn PDF document text
    • http://mg001.cn/upload_fck/file/2021-5-11/20210511190113427920.pdfIn PDF document text
    • http://tipiland.net/upload/file/82988554258.pdfIn PDF document text
    • http://candientushinko.com/images/file/71103877470.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef8c90bab7---bafuf.pdfIn PDF document text
    • https://hssanesteban.cl/files/dedinitepopisilomalizure.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/53049169068.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/ad69cffa3048e5695a238c1991e99e2b/logogiragerotusa.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee7ead1e03---53438367171.pdfIn PDF document text
    • http://eastmoorclassof1970.com/clients/4/43/4343e427eb1b0a0668350338a4d6b623/File/vefatejutonidisezowej.pdfIn PDF document text
    • https://senhewood.com/d/files/nazubemiwugebuxoxirevad.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acd74bc87fe---gaxanukaf.pdfIn PDF document text
    • https://atraba-holding.com/userfiles/file/4472657143.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/618637031f789114f0ed8bad9ade73f0/pimopuzekudejijuxitas.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/b819e82f6f2c42c074ad68f64bded5a9/wujukudozi.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bf176351575---mexakosuwujoruwidise.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/wanuweliwuboregak.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/sivikuruguwonidijamurilu.pdfIn PDF document text
    • https://thegioidongphuc.net/ckfinder/userfiles/files/daxifokoxujawerilo.pdfIn PDF document text
    • http://climacom.eu/userfiles/files/walelam.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_off0000d507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD507 10708 bytes
SHA-256: 6f5785ebabb237c048998617cd5de30831f92700e99e51309df31124c1ff32b8
font_01_sfnt_off0000ed75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED75 16860 bytes
SHA-256: 5b1634d31deb4677e46b0dee64c93fe4423e889063bfeda59d4acd76ec388f0e
font_02_sfnt_off00011992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11992 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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