Malicious PDF — malware analysis report

Static analysis result for SHA-256 97416f9983eda719…

MALICIOUS

PDF

88.3 KB Created: 2021-06-28 00:25:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: e9d6eab63ea25eb57646f41a55dfba76 SHA-1: dc1664fe5a4fa7886ec98ecb35492499847583d2 SHA-256: 97416f9983eda7193d2e2e4634c083ceda718c0f38757b7c7f0c8b7c2222ac44
96 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to compromised WordPress sites, indicating a link farm attack pattern. The ML classifier strongly flagged this PDF as malicious. The presence of multiple external URIs and links to compromised CMS uploads suggests an attempt to manipulate search engine rankings or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://archism.ru/uplcv?utm_term=the+number+of+subject+verb+agreement PDF link annotation
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8eaeca845b---legajevu.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca955e3f93---8348153713.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/d51bdd67774fbc1d4098ef4dca3307e0/19255473847.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/podezubadazoruwizukidagom.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16098366b82c49---pazanemusupidesuzod.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/0882bac63361a701583b2f123a4bce90/nijudedaxuvinaku.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609815382b07f---nuvigowubam.pdfIn PDF document text
    • http://agenziaimmobiliarecannavo.eu/userfiles/files/wutuvomemutunoluboxal.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc5b629aae---14351907713.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/60830119012.pdfIn PDF document text
    • https://pindimana.in/uploads/file/fajuninejezejulaxaluje.pdfIn PDF document text
    • http://aliglobshop.com/userfiles/file/kopigatekawugefarofaxa.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2b34b5eb5---ximofipovopudupetejilala.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/914ef67d5cd2dfcc59a7f032f3baa4d1/23407084736.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles//file/deposanusolipisiwuna.pdfIn PDF document text
    • https://sce.tw/uploads/files/60bfbc22e2e2f.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/9262343783.pdfIn PDF document text
    • https://thietbivesinhanhhuy.com/asset/files/padijopaxiposadesasod.pdfIn PDF document text
    • https://barrierball.cl/ckfinder/userfiles/files/19952346896.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/hc4fmlot23tsn6qgmkj1cqveu7/dejiterotirotapapoliser.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/auljlg610g706ml6u02300koqj/62920950597.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/cbc2b475092f25f0451009354f73d1b3/pitovewogemavomula.pdfIn PDF document text
    • http://ownlines.com/upfiles/file/89326046486.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607eeb1df0fc4---rufodufurasegigidev.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/nubht1efjahtuv2n9krbjja3r3/somoripoleb.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5a0a6e15b3---tebarun.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_off0000f69b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAD 16608 bytes
SHA-256: 80acef3fb925c0574b6e4cc471952fed6de8be38a18ed8d39562311c90ad362b
font_02_sfnt_off000139dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139DD 11044 bytes
SHA-256: 604ff9e105bc6c9baf323e7129ec2b8868f9aab2e8cfa97bff836080f3306bdd