Malicious PDF — malware analysis report

Static analysis result for SHA-256 75b70afe7b0253e4…

MALICIOUS

PDF

100.2 KB Created: 2021-07-07 12:26:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: bdee80f3ab7ff3890b834dc52c4d28a5 SHA-1: 18ac2b466c2f53422680404fad54f4fdd714c47f SHA-256: 75b70afe7b0253e4f766337ef56067d2eae7307d415d054a2e572884365816f9
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing lure. The document's structure and embedded URLs suggest it is part of a link farm hosted on compromised WordPress sites, likely intended to redirect users to credential harvesting pages. The presence of MFA/one-time-code lure heuristics strongly indicates an attempt to steal session tokens or bypass multi-factor authentication.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092809890f02---95028891629.pdf In PDF document text
    • http://perfekttorun.pl/pliki/lukikofopegejikaminijefoz.pdfIn PDF document text
    • http://mawaevents.com/uploads/file/76320985361.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/46c08b3cb68e9774d3b2d99550341337/29853463964.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/bf4adr2q2p9dn0hl21gdvs78q1/mebiwuzapagefa.pdfIn PDF document text
    • http://candemdientu.com/Images_upload/files/fimilatu.pdfIn PDF document text
    • http://tsg-edinstvo.ru/userfiles/file/52966558268.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/f7tdcicsonjbpt8072kki125kg/53234781305.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/viwapuzutifagu.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/paguwalasufoz.pdfIn PDF document text
    • http://yljx.cn/images/upload/File/xejoxasosede.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/32dfdd5ca18fa9a1fd120c3de3094ab1/limovonibezorogewixixa.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/4d2q317mpi05c3n2bek40bf8le/601208834.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/64ea50ed58d6d8749919196b93f6ea8f/49073045627.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ec7615f25---66149681046.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3446f86f9e---25483726362.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b249445baa9---pelafarilaw.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606d236b86c7c---41349241726.pdfIn PDF document text
    • http://stjconsulting.it/userfiles/files/36396311061.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/56cec38eb41adec60a537eff4f372a8d/zasisirifeliladeku.pdfIn PDF document text
    • https://hmanagement.net/userfiles/file/31724608674.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fbcfa6ea1d73f11f5e5fec8c4607392b/37312883172.pdfIn PDF document text
    • https://nicosiacaffe.it/file/42472232525.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=best+singer+in+one+directionPDF 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_off00012487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12487 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013c99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C99 18296 bytes
SHA-256: 9515896725e614b2725a4ad8e90401a97419ca43255e00d77cd9a9aba9497188
font_02_sfnt_off00016c21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C21 10388 bytes
SHA-256: 9ce0899e904ca665a0d09220620970fe5280578944317c7d22de20b0a56dc8e8

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