Malicious PDF — malware analysis report

Static analysis result for SHA-256 e978388ea0f30a00…

MALICIOUS

PDF

92.5 KB Created: 2021-06-30 20:59:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 630209e1223f587d3cab6c121309d2e9 SHA-1: c2e5b75b7ebb30513560ca36d15e63ea173aba01 SHA-256: e978388ea0f30a00efdc9130a343249e56ff4c11862cb987c08ec9f92b67870f
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external sites, many of which appear to be compromised WordPress upload directories. The critical heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document's content is designed to solicit sensitive recovery information from the user. While no scripts were directly extracted, the presence of embedded URLs and the nature of the heuristics suggest a phishing or social engineering attack aimed at credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • 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://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607a177b4206a---dewasisaman.pdf In PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab708773a3a---6987835948.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/e7a177a7892a80ee78dc0d0b028a99c0/vuvoxesira.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1e4cfad66a---61024958499.pdfIn PDF document text
    • http://motorlustor.net/userfiles/file/87739452433.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/09e74c7a04a2bc6ee5bdc9990f82ad2d/pelixawarumitugubesikidom.pdfIn PDF document text
    • http://0-50.ru/userfiles/file/dorogovalijeloruzifosaxa.pdfIn PDF document text
    • http://beiks.info/public/file/ruvogur.pdfIn PDF document text
    • http://langfordfinancialservices.com/userfiles/files/regatipofini.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/216agulstja14m0mi11qauj61n/nelaluweboroburekoz.pdfIn PDF document text
    • http://lavalnerina.it/userfiles/file/36416246855.pdfIn PDF document text
    • http://cambresisemploi.fr/ckfinder/userfiles/files/wugudodikazular.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf4fab7175---lugixaloxezuxi.pdfIn PDF document text
    • http://scheidenschiedam.nl/uploads//file/66662446615.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085eee8d980b---93950547117.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/fadab0df50830da44783b0aadb8d9b99/rimureforevaxaxijefomit.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6489ae53fd---57071455565.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/aed6ff92e779a38157be258cfc789183/75569243881.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872fa307025---63375744807.pdfIn PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a90a98310ca---86608032954.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/a15cc6e3827bf30e5394ae3ae524cfaa/67472990738.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a87b59d93b0---7817635019.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/s2qj6g8mbp66l7pkih741885uv/74390717299.pdfIn PDF document text
    • http://nowator-zpu.pl/userfiles/file/jufunovogigekazale.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=common+type+of+cyber+attackPDF 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_off000105d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D6 17208 bytes
SHA-256: 29c0ca4d4644e9d6880d1eb3a9733c4ffeba81b146158d4cd5a4d0e4c5215bc1
font_01_sfnt_off000132bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132BF 10712 bytes
SHA-256: f7bffeab0ed6884964c869a19708d0286cfb5931cfa7b2a7c7b318ea3a023964
font_02_sfnt_off00014b34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B34 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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