Malicious PDF — malware analysis report

Static analysis result for SHA-256 2623aba8205b050a…

MALICIOUS

PDF

145.6 KB Created: 2021-05-02 03:33:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 01af52660cb55b6568b34d3222687077 SHA-1: d495c4a436cf65b5c3cd5a5006c897bf7431c4b2 SHA-256: 2623aba8205b050ab195332f5e45429b486b96dc1d3071876fde0e9643f607d5
96 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites used for hosting malicious PDFs. The ML classifier strongly indicated maliciousness, and the structure suggests an attempt to lure users to external sites, likely for phishing or further malware delivery. No scripts were extracted, but the PDF's structure and URL targets are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 http://jjmcp.jp/userfiles/Image/file/60071494707.pdf In PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16074706bcdb0b---femimemededule.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/da744d443048cd81d58bc5b052c7e40f/9462842910.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/3dbae4bc1d21fcad229d40ec3487d442/33349275842.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/3736536c5a5a2213f3b034a54319d49d/fijamej.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160723c5c85509---pufabigevuwefaruna.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1b81efb05---jebuj.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/lck5gj0q1uc2igloaebu7l5mrj/51288028415.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608adb24aae85---mozinutuvedivovuxagawubus.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16076ade3d30be---jepadobimusolu.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d4f0e6d6a---96222513982.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/d0d6b7e924c057292200535d03c50c8b/47105332673.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4a47e755d---befijigepixobiwiboropobup.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/e1vv18rkfaqrkbfb8q6ns0opt5/31547860809.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608090fac988c---941525748.pdfIn PDF document text
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8a565f49e---duxanigoduk.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/a17431e95a89f2f2ad0be3d780b2aaf6/potepilaludu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=carinosa+steps+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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001f2b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F2B2 2964 bytes
SHA-256: d4013dedb3f223d95040145457c22f7bced092b720451322edf38c66f6a4c115
font_01_sfnt_off0001fd47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FD47 4908 bytes
SHA-256: 5aeca2ca75a6f009691460031214521a9e5a4ff9ed80b111c14c07768a2b4dab
font_02_sfnt_off00020e04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20E04 13344 bytes
SHA-256: b49f4ffe8f8091c1cee9274c1edcfc9b55b5b3f157555185216d5e6d5d7cb384

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