Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e75bd21590b709f…

MALICIOUS

PDF

71.2 KB Created: 2021-09-22 19:45:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d22773aa7fb265c337fcd96084b1e34d SHA-1: c9f6730a0b3bde56c29c25f42fd23fbe0ef8a734 SHA-256: 2e75bd21590b709f5d6357a2f1d17024f10e38b341731956381e77c17f6329ad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan delivery mechanism. It contains numerous links to external websites, many of which appear to be hosted on compromised WordPress installations or disposable domains, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://crewmak.ru/uplcv?utm_term=android+tablet+security+settings PDF link annotation
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161464cdf7af5b---41667265882.pdfIn PDF document text
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/33377978342.pdfIn PDF document text
    • http://wang023spa.com/userfiles/202109file/2021091602341070554.pdfIn PDF document text
    • http://munnarteabungalows.com/userfiles/file/40640721048.pdfIn PDF document text
    • https://am-system.eu/ckfinder/userfiles/files/dekakotitosajipiru.pdfIn PDF document text
    • http://techniq.ae/admin/uploadfiles/file/32175664182.pdfIn PDF document text
    • http://0975811252cool.linker.tw/files/34151231750.pdfIn PDF document text
    • http://mitchelllawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xinujenivefitopaga.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613f2e64d16a6---66074196796.pdfIn PDF document text
    • http://erainbowrealty.com/userfiles/file/86921856230.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e754265538---totadubesotepej.pdfIn PDF document text
    • http://studiogiamberardino.it/userfiles/files/229614215.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/pikanalola.pdfIn PDF document text
    • http://osstemcardiotec.com/files/fckeditor/file/1128850061612ef17a078cf.pdfIn PDF document text
    • https://globalcircle.club/userfiles/file/62566237612.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/161340a4bd566d---56003597418.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1613f943019a1e---6326120265.pdfIn PDF document text
    • http://pedraferro.com/files/files/vekigovux.pdfIn PDF document text
    • https://stancijanegrin.com/UserFiles/files/zidadovav.pdfIn PDF document text
    • https://www.cdsale.org.au/application/third_party/ckfinder/userfiles/files/4688383293.pdfIn PDF document text
    • http://kazuma.ru/ckfinder/userfiles/files/revikonolorodi.pdfIn PDF document text
    • https://latework.cz/soubory/25166555750.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_off0000b79a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB79A 15244 bytes
SHA-256: a8ee4707b10cbb64ada2010dfd5dbdf265d9b2751a98b3bfc4e29f6d3a159b5d
font_01_sfnt_off0000de15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f62c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62C 10880 bytes
SHA-256: 8c1b459ca4c63106c79551fd832ec34dc8ca25ff3060514b84d6bda29c423f7c

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