Malicious PDF — malware analysis report

Static analysis result for SHA-256 75f274907cf7e8a9…

MALICIOUS

PDF

85.5 KB Created: 2021-07-06 15:32:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 4752fa2f07b80f2d4a45f4b7f046a208 SHA-1: 5db5848acdf23a7f224485c8b90ea491b0b388c4 SHA-256: 75f274907cf7e8a9c70138a20b16aca0d92838487f43dfa647daa8da015c428b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many pointing to compromised CMS upload directories and disposable hosting, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to lure victims to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://schmitz.cz/res/file/96452441867.pdf In PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/664730210344e0fa7d072477a50d1e80/36191231885.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160832064bb2e1---30189569934.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/66977810307.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/900478c748a4ea1fb0fa2103254ba283/rutal.pdfIn PDF document text
    • http://theettiaresottawa.com/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/zudebuwex.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/kubudowam.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b39fde7098f---24547501059.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160900f1d6b229---68415037971.pdfIn PDF document text
    • http://www.fonfe.com/uploads/files/likojokejezova.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b2083cc44a5---pifodavibute.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/55c418787fab377431499f749897d8ff/94598520427.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bd09cae7d48---3976387401.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084cebd4ef1a---84184865929.pdfIn PDF document text
    • http://machinegroup.ru/img/outer/files/gelitipunimuzuxub.pdfIn PDF document text
    • https://maximatrimony.com/ckfinder/userfiles/files/67363980784.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/80f2694ef5a50a68188f0963c7cd579a/xilifivivewepaxaziwuw.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/84667820974.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d57c0a71ce---kasupobekujelilotutijezof.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dalobunisejibeparetejukos.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5e566bed4---rukuniputetufofunej.pdfIn PDF document text
    • https://oddluzanie.net/userfiles/file/bovenutijupuno.pdfIn PDF document text
    • http://budka39.ru/files/kuxepijijuxopuvepe.pdfIn PDF document text
    • http://zgkimsteszew.pl/img/upload/files/77497219746.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/58966736132.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=lesson+plan+on+the+theme+travellingPDF 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_off0000eb4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4F 17080 bytes
SHA-256: 5c6e0adcb672e6ef590b73709faeaba7a6710c9e735b7529895f6b3e9abdc667
font_01_sfnt_off00011808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11808 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001301f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1301F 10720 bytes
SHA-256: 44ad7ec01ee1d9cd123f69980130c8aa8f23eb09e15db91e6c2e140cd5dfcce3