Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d9c317c65e4862c…

MALICIOUS

PDF

90.9 KB Created: 2021-08-05 06:55:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a9cd91c3c84052cfce61bc898eba1678 SHA-1: 12d2340553c590b50f340167c152e8bcbafd4273 SHA-256: 2d9c317c65e4862c05e74599f362b52e2255f74416c4cb87871d84b6abdd04e3
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute phishing content or malware. The presence of multiple external URIs and link farm heuristics strongly supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://allytemp.ru/uplcv?utm_term=how+long+should+i+study+for+the+fsot PDF link annotation
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b9e594076a4---tenagewevugadukapavekozi.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/pejatonulivabu.pdfIn PDF document text
    • http://akwarella.pl/user_uploads/file/90392820005.pdfIn PDF document text
    • http://choinka4x4.org/cms/files/file/sudidufafizerasi.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160f3b9c18a0cc---jamowog.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles//file/54164676925.pdfIn PDF document text
    • https://webshopplus.nl/app/webroot/files/userfiles/files/bosuwotawowenefulotebi.pdfIn PDF document text
    • http://aodaiminhhanh.com/app/webroot/uploads/files/64675356479.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/0a43501efba48a5151868ca5fdc42724/57489412295.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/a106c9aa7c1b90b5455b76eb623d53b3/lapavefija.pdfIn PDF document text
    • http://candientushinko.com/images/file/78562529225.pdfIn PDF document text
    • http://versobrokers.eu/userfiles/files/33638250562.pdfIn PDF document text
    • http://abpaluso.com/upload/file/kavibugabavar.pdfIn PDF document text
    • http://1984wnhs.com/clients/2/25/250e0aaa51dad033202e6c34d8602b4d/File/lovelabezik.pdfIn PDF document text
    • http://trhs1966.com/clients/b/bb/bbabdd843433c1cf4d3e80624837507c/File/viwutulosepuwejemaxewemo.pdfIn PDF document text
    • http://haozuowenwang.com/imagefiles/file/49607598974.pdfIn PDF document text
    • https://euforbiabulgaria.com/uploads/pages/files/10084409499.pdfIn PDF document text
    • http://ahdjcm.com/upload/files/49982255983.pdfIn PDF document text
    • http://ventilatoryzlin.cz/images/file/33594114074.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081b4a973d6f---vafusujajopitexemo.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/dupokotiterifewogokupes.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb651256132---85788522171.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160896989cd586---femawaw.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c94745ed5e3---tusafugo.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_off0000fcaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAA 18348 bytes
SHA-256: 7355dbe6be73d29152a0171cc7466547740952c335fb8e5ee4a77cc5b03b3f2e
font_01_sfnt_off00012c91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C91 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000144a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144A8 10764 bytes
SHA-256: 4a022531e13db72805149d9e5a6f5a7d7246e593b68a8c9514b05a23a4231e34

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