Malicious PDF — malware analysis report

Static analysis result for SHA-256 7def36b90f80087f…

MALICIOUS

PDF

97.0 KB Created: 2021-07-12 22:24:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: b28030b60888626dcf4930293f560f1c SHA-1: 2c8852f6bba00d441802a383e85fff3d7d6a0c4a SHA-256: 7def36b90f80087f98e61f561a73cdb022768ea7e671da0329ec57b9aeb22cc2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other domains, likely intended to lure users to malicious content. No scripts were extracted, but the structure suggests it's designed to redirect users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9811

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://laborke.ru/uplcv?utm_term=let+the+genie+out+of+the+bottle PDF link annotation
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/d217bb1c35a1be129b74f03532f490a2/mubekijaloredaperavemosim.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098252091e8c---12255156232.pdfIn PDF document text
    • http://bazis-expertiza.ru/ckfinder/core/connector/php/files/15276140896.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/32baa1b8a44f73241ac026ef3e59e709/37375230795.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc0454b0c4---nezunatutopaberamafori.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/d48519148d39d4c424fd5f0d24155bc9/91145687775.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a3237a9e6a5---12386876173.pdfIn PDF document text
    • https://almuhja.net/ckfinder/userfiles/files/fonusul.pdfIn PDF document text
    • http://irishheritagesociety.net/clients/7/7f/7f3653e4c5d791bf76f28d2bf9929747/File/vudolusidew.pdfIn PDF document text
    • http://panyuchen.com/ckfinder/userfiles/site_eachfun_com/files/gaganubuvadozigirad.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a523b9ddf7f---gubagajudagotiz.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/47080479937.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d92b6120f5c---96702410838.pdfIn PDF document text
    • https://livresdarts.com/ckfinder/userfiles/files/kojupunesegiwuvi.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab107205ddb---90352726853.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/s6tc7jf26l8188s6kh0bkf1us6/dolirogo.pdfIn PDF document text
    • http://fmi.lu/userfiles/files/47088723426.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/353e09071634c54e336e4fbfc334890d/namafolamedikugewim.pdfIn PDF document text
    • http://jakpaisanestate.com/images/upload/files/wigur.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/2f4fbd5175868e414ba82a6914114e62/50283497056.pdfIn PDF document text
    • http://chinahongji.com/d/files/xoxowiladamanefegawo.pdfIn PDF document text
    • http://bloemenwinkelindex.nl/images/uploads/mogusogiv.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b22ba4b57f6---94947861394.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160987b549be6a---57289577647.pdfIn PDF document text
    • http://smithmaloney.com/clients/3/32/32eae1a42220421eddab78da2f55685d/File/97450343468.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f52e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52E 16300 bytes
SHA-256: 7de3945c76456ddb0086ca176daa0dcddabc00209f69205c99b13d743a5937d1
font_01_sfnt_off00010b6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12385 10260 bytes
SHA-256: 7d1095cc4601d5b87d1371c6642c9080086b39a6dd0bc28de46edc4db7572335
font_03_sfnt_off00013a6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A6A 2940 bytes
SHA-256: b0ec3fa10e5d6fc72ddc6ef94717f06fddb51113eb6982e30fa52b1e35655cfe
font_04_sfnt_off000146af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146AF 17676 bytes
SHA-256: 2e1b12855ad161936dacc3775f7a845ce8ca52c927728cc5fe36bf8b5671421b

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