Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ee7dc662c1f3878…

MALICIOUS

PDF

96.8 KB Created: 2021-09-05 10:02:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: aed70ce7d0782de6ca0ca1ec848078ba SHA-1: 2b5c24f937b5083fe769073dd1c6a48e1d3859e6 SHA-256: 5ee7dc662c1f3878d2a52a3d6e8c900ea8a490287eedc38e504841f532b77272
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various websites, many of which are hosted on compromised CMS platforms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to direct users to phishing pages or download further malware. The presence of a link farm and the use of compromised sites suggest an attempt to obscure the ultimate malicious destination.

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://drafthe.ru/uplcv?utm_term=d+lgs+231+01+aggiornato+2018+pdf PDF link annotation
    • http://zerosquareonline.com/file/59414212651.pdfIn PDF document text
    • http://xz-brand.com/ckfinder/userfiles/files/12229660345.pdfIn PDF document text
    • https://travellifeafrica.com/ci/userfiles/files/zabakaxurojumorekabagele.pdfIn PDF document text
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/0dc4bc4d2083ddbc2457fca16807932f/37862408293.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/e2bf19280fe4656f7abd5a057966a033/nusofapo.pdfIn PDF document text
    • https://waroproject.com/file/15097886216.pdfIn PDF document text
    • https://chokysitohang.com/Uploads/userfiles/files/81854551679.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609c62355c22d---gijal.pdfIn PDF document text
    • https://techielingo.com/fck_uploads/files/tiwadun.pdfIn PDF document text
    • https://invest.pl/userfiles/file/80223784613.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/67831828985.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e4b7595a1---bevezaxixunom.pdfIn PDF document text
    • http://bulongvungtau.com/media/ftp/file/wukowapamofovinu.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0553e63e8f---pivakelatedosapijenuxofo.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160816d555fa83---93099998332.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160754c10dc12f---4863472012.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/34123522972.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160700818d995c---24775599656.pdfIn PDF document text
    • https://willmarareachamber.com/ckfinder/userfiles/files/toweto.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6692b81fe---tosevefebatiduduxaridu.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af89c6a1890---dazagoraridejuzob.pdfIn PDF document text
    • https://coastalholidayproperty.com/ckfinder/userfiles/files/25247705103.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce11ebfdf8---55213070219.pdfIn PDF document text
    • https://kermoulin.com/userfiles/file/kuselijuxegol.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_off00011329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11329 17780 bytes
SHA-256: 0178be5fba337f7b3c598e53a8d3c9a02d851a50e52832f443bc2d281700e5be
font_01_sfnt_off0001416e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1416E 11216 bytes
SHA-256: 0957734ba37cb956d1878902522e8d100b481429385b3a58c167a5373b1181fb
font_02_sfnt_off00015bac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BAC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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