Malicious PDF — malware analysis report

Static analysis result for SHA-256 177cafd8e0d07c1d…

MALICIOUS

PDF

95.9 KB Created: 2021-08-12 09:19:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d9b4f731469ee64c9d909f107303c889 SHA-1: d008fc916277e9c2c77a0bcb38d7d1834220563f SHA-256: 177cafd8e0d07c1d6596d9123a2861eeb11a8eca7ac1ec225c64ffb7b91356ca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. The heuristics reveal it functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting. While no scripts were extracted, the structure and URL distribution suggest an attempt to lure users to malicious content.

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://dancleland.com/img/upload/file/6072802813.pdf In PDF document text
    • http://matstravel.ru/userfiles/file/91426883925.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a99a4b7892---gorexutasivudiromupuvi.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/252928139bd687053431b2a02c0a6f2a/92814344418.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/85a09b2dc16784a5335f9e8ff971daed/fukefisopi.pdfIn PDF document text
    • https://ruiguoex.com/upfile/files/2021/07/19/tuzuje.pdfIn PDF document text
    • http://ogledalata.bg/uploads/pages/files/baxipoditafajewevifulofix.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/od7ssc3b7jh84c8oc8e6s36e6l/99963561312.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/07/19/file/20210719_190330_187.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a67f44e6022---nisurifuvemapu.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/a83aabace4ff89752a08bb1e8ca5b6e2/gofavojisukinelinedufux.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb20cc3621d---28973410739.pdfIn PDF document text
    • http://maility.pl/_ADRESuserfiles/file/guxox.pdfIn PDF document text
    • http://bearcatbb.com/CKEdit/upload/files/vututisajegimotew.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/81odeb5f51clf7d5rc110kabn6/27234498.pdfIn PDF document text
    • https://medicentrumnz.eu/medicentrum/files/file/nisopalenixajibomivupi.pdfIn PDF document text
    • http://kahsport.cz/userfiles/file/45721003475.pdfIn PDF document text
    • http://kyanite.tv/userfiles/file/76864068518.pdfIn PDF document text
    • https://uaatc.com/userfiles/file/16350311225.pdfIn PDF document text
    • http://zhongguohuachun.com/d/files/mogasa.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16100da9c9705e---25809672257.pdfIn PDF document text
    • http://thuonghieutoancau.vn/uploads/files/jamirujog.pdfIn PDF document text
    • http://khaskhaan.mn/uploads/userfiles/files/43776128942.pdfIn PDF document text
    • http://tribo.kz/userfiles/File/dukalekileto.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+plant+kiwi+berryPDF 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_off00011398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11398 10500 bytes
SHA-256: 25d0734ee4e9394f8bfd1df77b7744d64129e71ae721101a944e48194b673028
font_01_sfnt_off00012b63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B63 17780 bytes
SHA-256: 116d1ef3e1820fa7ce208022b9679b73f92df16d0563be0ffaf182d4f91a6a99
font_02_sfnt_off00015a4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A4C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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