Malicious PDF — malware analysis report

Static analysis result for SHA-256 f63e86c19ab11622…

MALICIOUS

PDF

73.9 KB Created: 2021-05-28 08:20:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00b91e5bdcef5a8dba318cb73d93a8ed SHA-1: b28dbcf58ef9d10c83f0a5b93d77ead217fc96f9 SHA-256: f63e86c19ab11622b44b767e5ff11cb219582ffbb37f29add80690c68ad753eb
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, suggesting a link farm designed to distribute malicious content. The document body, though heavily obfuscated, contains metadata related to PDF generation and a seemingly unrelated search query, which is typical for SEO poisoning tactics used to attract victims to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/d294nufihpablhtv1rarert533/xiwomuwa.pdf
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3ace989a3---80118826672.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d249b32386---golidesuwedipoxovis.pdf
    • https://weeb.nu/userfiles/file/23103016778.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/f8ail8uae7l0qsne67tu4otq3h/wafifegu.pdf
    • http://musorcentrum.hu/files/article/file/22611992792.pdf
    • https://aquafilling.com/userfiles/file/gipokidaboxatelaravivizut.pdf
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160794fccecf9b---76015109579.pdf
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609734d3eda10---58150870573.pdf
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160725c9a58bee---39590360655.pdf
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/6qmlvmgqn7vkv1lbmhc4nek859/kitip.pdf
    • http://vasvaripalmuzeum.hu/upload/file/masinurunazoribusupa.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16077c1c4dadd4---82980752721.pdf
    • http://technoculture.cz/admin/upload/file/vedotukavadanugi.pdf
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/16097ae803ed98---2238618526.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/u8t8ebipqdfe4c22nmahkkvda9/29762216868.pdf
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160a50625a0116---85051279723.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=how+to+download+hotstar+in+panasonic+smart+tv
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3e0.bin
f73870b3545ef48791bbf95a12a475cc589271a2a1d269875fecb2bf2bfd03c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E0 5424 bytes
font_01_sfnt_off0000f63c.bin
9f36d4839648ce253e2b949e3c2fee5118419a7bb4d818814139df4e7a7a6c94		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF63C 10656 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.