Malicious PDF — malware analysis report

Static analysis result for SHA-256 2798830984b843a5…

MALICIOUS

PDF

100.0 KB Created: 2021-06-27 13:12:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: d403eb6f63107f107fc83e67b425b211 SHA-1: ea0c538aabc3724de430db8ef89ad304579a358e SHA-256: 2798830984b843a50e0a36895c61c8d2bf508dc762e635d968c2841dc4252198
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and are structured as a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery through these links. The document body is unreadable, but the heuristic firings clearly describe the link farm behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/488215df2e832767af5b5d1d3cde3846/xojalitep.pdf In PDF document text
    • http://csc0851.com/userfiles/file/20210627172716_yminbi.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606ffd6eb91c3---samorivezozunikifaxutena.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074216a20dcb---87350087593.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/58dce09ece6e6a9888b93eed38429b5d/68244493244.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/c9a5c43bb9c62a7fb84d73715410268b/16945839642.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/5f237402d13d89dc3c158a1106891853/37066100271.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/dadulidixivulorida.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb53ff2064---76104906150.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/ed61ab5a7d11a8c53306ab68193dd8ff/xewoduluge.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608744a6052fe---55410817854.pdfIn PDF document text
    • https://krassimirtaskov.com/userfiles/files/92462589854.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/24dbccacaf39e4c1e3aded6681b83f5c/75107536449.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/dinokukigob.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/b3f318813a98c5bcb6e412c825beda41/43276541329.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/v9gpp5vt8tr8b4dorildot4ah2/raxidamixusofarol.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ddf20c7a549244d4ecc572611a3c55f2/benadasetulumomep.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/iuok7uajlp35n5k4l14gcq9f28/68117400274.pdfIn PDF document text
    • http://bscartridge.com/pic/28708624053.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/7f4acm7q28hagch4jrtsd3efv5/dofosaburawelutabi.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160b1913bef1c1---20895944636.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/ivgbinudum5k7bchj5e6q5ede5/43303879269.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16078d4e3d3020---vopogezosajuji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=how+long+to+boil+coffee+in+percolatorPDF 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_off00012398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12398 18220 bytes
SHA-256: f5f0817ca7a79606980df144412442dd99e4c01b8d9ec9b97f99656650eea3df
font_01_sfnt_off0001521b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1521B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016a32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A32 10704 bytes
SHA-256: 7f0e01a15a1b44f20c756f0b40ffe3dd162798d3acb365de7dc5781bdeb820df

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