Malicious PDF — malware analysis report

Static analysis result for SHA-256 0de0c1f2c3454a4c…

MALICIOUS

PDF

85.8 KB Created: 2021-07-03 06:13:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 87951432bf22101657d8307bb2a66edf SHA-1: 6525dae4a581b668db131f495720ceae1b7a4978 SHA-256: 0de0c1f2c3454a4cb163b1632bc3abd2c5724d9e640176cdd2035bc41651a3b5
96 Risk Score

Malware Insights

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

The PDF file contains a large number of links, many of which point to compromised WordPress sites. The ML classifier strongly indicated maliciousness, and the structure suggests a link farm designed to redirect users to potentially harmful content. No scripts were extracted, but the presence of numerous external links indicates a likely attempt to lead users to phishing or malware hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097477499901---30898460596.pdf In PDF document text
    • http://goodtraefarm.com/ckupload/files/64634583137.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/3005227a7d876558980c563e7e7bae1d/85486000436.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/fb0b99fe14fd5b1b4d5afde0e6fa1407/73281551289.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8656376cc9---mudavom.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/84168481949.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/24538914649.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/14c7a87c2cdb2945261e7c6c7c22cd62/suxegivozinaxisanudijovup.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/dvmehfbk9t0b2f2illv34kmpk7/kazefanebu.pdfIn PDF document text
    • https://ubranni.com/uploader/files/41574577491.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/57be04f9e9ac347a39c01be67341b53a/senadasewokegoparivasup.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/ddd9cbdb75d695b95430878e0be85107/69007025968.pdfIn PDF document text
    • http://daimarconstrucciones.com/images/admin/file/fixobad.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa5a88871f---karomowijiduvijox.pdfIn PDF document text
    • https://thietbivesinhanhhuy.com/asset/files/rinuwuxetefe.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609fcd038ce81---46677930484.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b67716c701b---55930927468.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0976800001619995706.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/1609870c88a25b---kozusa.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/nimoxowip.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/nerelojisolivigi.pdfIn PDF document text
    • http://sewakendragroup.com/userfiles/file/sapadizo.pdfIn PDF document text
    • http://dailygiasi.com/uploads/userfiles/file/76911071383.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a25cd4ce828---kukifoxogiwiniguna.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/duruburilexixavukavegotod.pdfIn PDF document text
    • http://colorfulmedia.de/fotki/fotki/file/81786684855.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+screenshot+someone%27s+snap+without+them+knowingPDF 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_off0000ebad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAD 16892 bytes
SHA-256: 16ebb953b14b0fa053625aa2ed36fc95e44f628a9ad353027fdd64c061d3d275
font_01_sfnt_off00011773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11773 11080 bytes
SHA-256: c5308b907f6096ac98cd72685880d063e4ec368f60547ad40b0fa8ac4a4ac871
font_02_sfnt_off0001312d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1312D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1