Malicious PDF — malware analysis report

Static analysis result for SHA-256 6be3d651d52c9836…

MALICIOUS

PDF

101.1 KB Created: 2021-08-15 14:14:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1200805aab124cbafdec89b3b2aa09ce SHA-1: 834861b82fd3372393fe29a889b2f4001ad2e6fd SHA-256: 6be3d651d52c9836c9d7c125a8ca6895fe628650ee4573d09dfeee8c399d59d6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a link farm pointing to multiple compromised websites, including WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded URLs suggest a redirection mechanism to a second-stage payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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://drafthe.ru/uplcv?utm_term=cu%C3%A1les+son+los+s%C3%ADntomas+de+un+ataque+de+panico PDF link annotation
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/04944c849b27b12ffc6f8417948419b7/namifapinaxefidujiseleram.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1055da6e7---putem.pdfIn PDF document text
    • https://nepalonetours.com/userfiles/files/86316924330.pdfIn PDF document text
    • https://eitmedu.in/ckfinder/userfiles/files/94601789516.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160747b9d33a2f---xiruxosovifo.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//82490505295.pdfIn PDF document text
    • https://ahha.az/userfiles/file/bezelukunizebafufexu.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/59409141838.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/32b3a241b564c6f9fbbaa39c3388ac4e/50739575633.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b5994f42021---37975074872.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/90k4aed6ka9abu6iau162sttv6/zutigosupidamajoxikoki.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/fe809ad68e721f11751f41a0ba1d7392/turopadirinojelovopo.pdfIn PDF document text
    • https://franchise-vietnam.com/app/webroot/img/files/66149941069.pdfIn PDF document text
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/74012677850.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/gividom.pdfIn PDF document text
    • https://nedimgame.com/calisma2/files/uploads/93385661821.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609434721e006---feziropavugetirit.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/248ap6i25a2fu5tfgual6bahlo/55204282423.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1608121dd974f8---59828850254.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d1365d4318---nusikizakatap.pdfIn PDF document text
    • https://memoservicesrl.it/file/82492288084.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/f7e1b99867cc21ee9973b1ef6243a109/63566864185.pdfIn PDF document text
    • https://skinrepublic.vn/webroot/img/files/ludozaraga.pdfIn PDF document text
    • https://aglogistics-bo.net/userfiles/file/netabutuxageromuxi.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/79703c6d921aee7d370782098bd9ef67/10693289810.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001232e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1232E 11092 bytes
SHA-256: 56c5dbeb4776a1b22dc34d8a35870fb62061c05c6987e1e7669252b3418713f0
font_01_sfnt_off00013c5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C5C 18884 bytes
SHA-256: a80002d33bdb94c9dce036e01a889718c5b1d3cb886140b2cf13cbe03e091b1c
font_02_sfnt_off00016c54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C54 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1