Malicious PDF — malware analysis report

Static analysis result for SHA-256 372959050075ae10…

MALICIOUS

PDF

101.5 KB Created: 2021-06-29 08:50:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 3d1c6b2a6135c8f7c939e4e673f61b4d SHA-1: 3ba264f548635a25f520657f3d2166effa8a2a7f SHA-256: 372959050075ae1040de8c26c6303b19fe0c2bb72c7f8c525f7fbec0d5a27dd0
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' suggests links to compromised WordPress upload storage. The ML classifier also flagged this PDF as malicious with high confidence. The document body is unreadable, but the structure and URL patterns suggest a lure to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9711

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 https://smidgel.ru/uplcv?utm_term=stripper+meaning+definition PDF link annotation
    • http://kulturazebrak.cz/userfiles/jugipejodododatasem.pdfIn PDF document text
    • http://atek-ent.com/upload/file/43216441894.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608111203c158---kikupawujogotekekaxine.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608559879485c---70477651481.pdfIn PDF document text
    • https://electroagro.es/pub/files/sipeze.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/1d261075cb13c65aa8902c3105270a60/gitipenawajivedupakeb.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/uhpl0gc32mfvvfmbarb8sr2fp1/87591493447.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160739f9066e36---41959360024.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6798ac609---31063272029.pdfIn PDF document text
    • http://alternatifmedikal.com/img/userfiles/files/gekikaxelawu.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/u2r6qmeuder5b5gtnbf1rouk63/52303654476.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089b8313aba2---14494728984.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5eb96a563d---pifafelipotew.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071c3fb702ac---tivasapiv.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160cb05a2c1ed8---wajojover.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/8fnjckjqgd3be2p8i0mnvicp6i/daxol.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c92d34f3221---58486568601.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/611404c4122093b9a3438cbeec2deb2a/230450581.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092e01086128---29162307119.pdfIn PDF document text
    • http://coopmong.com/ckupload/files/77035008839.pdfIn PDF document text
    • http://jfkanacon.org/data/userfiles/files/xagogenedevukara.pdfIn PDF document text
    • http://goreskyreunion.com/clients/b/ba/ba087d28c24afe6c5bc45fa062332e47/File/36904719745.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608acbf942e08---zepeser.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/39105260386.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00014538.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14538 17836 bytes
SHA-256: be280e12345c43b9af7dc3a81325f8d9e207b5fd3d940632980a01df6f60d65a
font_00_sfnt_off0000f01e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01E 24164 bytes
SHA-256: a0cb1f66b2d6dac0320e4ed0d0caaf4f066b31bd36babb2091c6df5daf6fe20c
font_01_sfnt_off00012cea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CEA 10700 bytes
SHA-256: b2848300ecb9a26b6c8238d7f8327c5841ee38778915e5fa83ac8c94c58b955e
font_03_sfnt_off00016066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16066 3424 bytes
SHA-256: 386002f15349cec0d25e87bc401b653b22ceda3f0dedc5838cc79b0c91892900
font_04_sfnt_off00016e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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