Malicious PDF — malware analysis report

Static analysis result for SHA-256 93831323e1bf6a83…

MALICIOUS

PDF

87.8 KB Created: 2021-06-25 23:52:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 6fd13b193852600ee5096ccb9aff223f SHA-1: a3e81ac29c143d707ad03d874dce6032067ef01e SHA-256: 93831323e1bf6a83301d5ec61220a240ea6998d105de30ce2c6c99d9c300b243
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to lure users to external resources. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of 'utm_term=download pokemon red chapter gba' in one URL suggests a lure related to game downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607191aeed513---pewasotaxosuliz.pdf In PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/tewinunitub.pdfIn PDF document text
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d03bb1e863---26657793792.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/ec585f216f6c6d5831263fa448bf5dd4/20734668429.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/tq59d64gvb00q5l2ld3j8089qh/kasusuw.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095bd222ce55---vezexizivivanuburi.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c99a6c4662c---57675795459.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607b12f83273a---bajebasafez.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/1bcd5f93363ca5da0b8f2a30d0e40219/tekogidivutadagegamidoga.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/3e022884a4df2c50bdf77cf5e9e97d0d/59780173451.pdfIn PDF document text
    • http://xn--e42bt3l.net/upfile/files/23454447756.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd0bf36835---sexewepijopupejazu.pdfIn PDF document text
    • http://netmutum.com/userfiles/file/70042984986.pdfIn PDF document text
    • https://dm288.rs/slicice/file/pimanibigexavebegaliliva.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/2c162206edbdfa682d391405e74d3826/19926772187.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16078b661492f0---74779000476.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/38407907848.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/9f12987abd1433342a5e4ac095ab6e29/71681477793.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5b20190e2---demojinidadobexunujojoze.pdfIn PDF document text
    • http://evergladesharvesting.com/ckfinder/userfiles/files/13187244936.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/43830712678.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b020a5cba51---76911503791.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/shu6gqo7fihc9tq13h63muludm/feturutisuvuzokogur.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/diparatirubata.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=download+pokemon+red+chapter+gbaPDF 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_off0000effb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFB 18456 bytes
SHA-256: c51d97501d7f5b7b6d0626337f00feebde8ed625c8a44d8769446beb83e73538
font_01_sfnt_off00011f54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F54 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001376b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1376B 11020 bytes
SHA-256: 11444aebd142a62cd9d480b78c17a4087ab82da66c58698fccb6d8b3f3996513