Malicious PDF — malware analysis report

Static analysis result for SHA-256 b12d668e513043ef…

MALICIOUS

PDF

83.1 KB Created: 2021-08-19 18:04:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0de462cf4afc3f997aa8a914c5799254 SHA-1: 368252cc3e1155ebb6f4b4fedae4a4629737f5ab SHA-256: b12d668e513043efedec9009fb925c5d99557343dbe3ac39d5edddac0a429e7d
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple links to compromised WordPress sites, indicating an attempt to host malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document's purpose is to trick users into downloading a password-protected archive, likely to bypass gateway scanning. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c24329224ad---kuvotigox.pdf In PDF document text
    • https://cincia.ro/ckfinder/userfiles/files/ribalekolelilol.pdfIn PDF document text
    • http://palletgoanloi.com/img-dn/files/1489613272.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160746665b8438---xifefu.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/kdkvare76lo15qaso4aepe7tr1/3910999145.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7d7ba90400---3303474209.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/724214870d826890fa5f14b49debfd75/36191078019.pdfIn PDF document text
    • http://lica-mpt.it/userfiles/files/26538021115.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f3c601a3e77---renufinafixowewexewob.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078b90a91171---50502099487.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5cb03a0d03---3503922190.pdfIn PDF document text
    • https://imahima.xyz/js/ckfinder/userfiles/files/pipuvowemukipetaf.pdfIn PDF document text
    • https://hkfew.org.hk/ckfinder/userfiles/files/33939858354.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/kisd60f99ttvotc3r9mj6srsg2/gixumomezew.pdfIn PDF document text
    • https://www.khaosanpools.org/ckfinder/userfiles/files/79814689892.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16115002a15136---vibugozaretepukawovawa.pdfIn PDF document text
    • http://murito.fr/ckfinder/userfiles/files/96785854249.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/89a3c1e11752d6d898222e5dd3046a7e/barulexamapuri.pdfIn PDF document text
    • http://proxkimya.com/resimler/files/15803617666.pdfIn PDF document text
    • http://perlawarmii.pl/userfiles/file/gobonumofijomasudobi.pdfIn PDF document text
    • https://www.temsilcifirsatlari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d146088607---35901967953.pdfIn PDF document text
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/vblrjh5v7p125r1t42shft9jcg/nasevuxaxusafo.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/40f2459df0b7885023174d78ffcbad3d/zebubeberozoxofodekiwuf.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/bfb5d877b316be788e96629db4f69d0b/jidabexuson.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/pp7925ig16meae5jsbc4uknvc6/44160465857.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=backup+reset+my+phonePDF 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_off0000dffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF810 17024 bytes
SHA-256: 5f5ec17553ae144e789bcaa597b5a554f4217de6046e65b86127ab35056fffd1
font_02_sfnt_off000124e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124E8 10860 bytes
SHA-256: 44c76b15db71c1ac9ba52035e31f2028e5e8e418b9aee9c9d6762d5d59f6df99

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