Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d6bd2cd0fe26a2e…

MALICIOUS

PDF

85.5 KB Created: 2021-06-28 13:15:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 5af1c121924eb5fe1513b641a9ee1b1c SHA-1: 9ccb366b4fb5055d5d0842d7b380f1df2a31595c SHA-256: 5d6bd2cd0fe26a2e9e64746c9d72c47ad29fcc2041aed2761a0e20b635b15cad
256 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1555 Credentials from Password Stores

This PDF document is classified as malicious and exhibits characteristics of a phishing lure. It specifically targets users by requesting recovery secrets or MFA confirmation, consistent with credential harvesting. The document contains numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites, suggesting a broad phishing campaign. No scripts were extracted, but the presence of external links and the nature of the lure indicate an attempt to steal sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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 https://chcial.ru/uplcv?utm_term=risk+of+not+having+multi+factor+authentication PDF link annotation
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/c6897dd4c4ad60a44cb3adbd149ee8aa/5660790173.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/47991146551.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeb6ee6b17a---wavogusadag.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/b409abc4531e0b03524301f60207d5e9/kopimigibutajop.pdfIn PDF document text
    • http://china-hold.com/UploadFile/file/20210530144557372.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/gozazumerokibunej.pdfIn PDF document text
    • http://brianhaymore.com/images/e/file/niterusugixemakus.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/9ec8deea04d6f4f63341f149f8858bf4/tetonuzib.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/31897659341.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9e3353feb442021411d106925df6b80d/rexokonivitonumebeziduled.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/41adef93546ca2125e67613a9d44a164/30559152454.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608922d6eb4b6---jubilobekovob.pdfIn PDF document text
    • https://bajrahrs.com/userfiles/file/siludixafev.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160730647f2cf6---buvupugisofubebesun.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c401d8a2492---pizekogewomupatisedepa.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aa45539c957---88762699738.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/3e75d54da5787f2c73f66f492644ebf7/49586840164.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16092e525a9fe8---kevegikabi.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/71461635640.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/rssb5dd5skvg4t0oeubvbo79op/49237384316.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b7239c12e70---togowovunaj.pdfIn PDF document text
    • http://newbusan.net/FileData/ckfinder/files/20210626_03E82017107C62AD.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607de6a1de8e9---81108726390.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/61800419865.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/zokifep.pdfIn PDF document text
    • https://vnsteeldetailing.com/UserFiles/files/48528385343.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_off0000e96e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96E 11088 bytes
SHA-256: c7f6f6d204ea4434d4ee32917103f74a83e1fec8a5ad0a632843466954132e62
font_01_sfnt_off0001032c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B3E 17244 bytes
SHA-256: 4977c7fab3c2a0c1702edad4ebe0633a124860750836bf2db20aec4afe847b39

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