Malicious PDF — malware analysis report

Static analysis result for SHA-256 c387ea60517a9103…

MALICIOUS

PDF

86.1 KB Created: 2021-06-28 04:47:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d769d5b38c2f41abd7364833be24961a SHA-1: 79c8d0f829048e5b63ef0e6ebef7ae2c5b0058d7 SHA-256: c387ea60517a9103213dcbfd80f1dcfaa9337ec6648db7c76f377b8b05707ec7
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://annandale1963.com/clients/69704/File/84099558612.pdf
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/ce10r5hetvpohqn4lgoa4k46g2/fukikato.pdf
    • http://ridgefieldpark1967.com/clients/3/39/39eebdc8797e30ee23d4fd57d071fd44/File/kuwujanejojamawisub.pdf
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609da272c432a---99209707746.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c93c8d7f39---30268747602.pdf
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/325ab39d369a8f4081c3ccfe8353e42a/23992963709.pdf
    • http://zrdb-drogbud.pl/Upload/file/pozisaguwukar.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa55b9d732---63901836944.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16085115b333a7---pipidapepewemuto.pdf
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609744e152ef9---27236806575.pdf
    • http://dansecyr.ca/pdf/file/wiregavu.pdf
    • https://sanipacific.com/attachment/file/19146787283.pdf
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cecbfdc658b---miloxusopuxov.pdf
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/9qarbrupf61mm3lmm3l109sel4/82621851691.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/26253dd2f15ad3ba3cdb0ac22050954c/jukutiregidepowopixenaxiz.pdf
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6610154d3c---29120565105.pdf
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/qhcd787ainmkvhhl4a7m6gcpq7/pivofulanedulipulemusaru.pdf
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/cd94270eaff27f6fef98c4b773b0559a/jofavigib.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/5no5a147pdvprsbd85bdbnlivb/ragim.pdf
    • http://singer-island-condos.com/userfiles/files/14421763665.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/7bb73e3d501876c9fd56ecf993696f8d/zemigijawujapurodorukur.pdf
    • http://cl-metalparts.com/d/files/webabitewapekepoberonofi.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16091061e4c019---fulasidorodogajiwaruwifor.pdf
    • https://sonarmusic.hu/up_image/file/41406156942.pdf
    • http://tms-operation.com/upload/files/18838990448.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=non+alcoholic+substitute+for+dry+sherry
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea0e.bin
2966746808ed8c6d7fb4afe8ee2261bb5221def0afac96706ac2fd9e2d11c93e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0E 18148 bytes
font_01_sfnt_off0001199c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1199C 16792 bytes
font_02_sfnt_off000131b3.bin
48a454f3b3757df4616e21553e4e8661a2e8d998e5345b3a29ff2d128cae2e4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x131B3 10904 bytes

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