Malicious PDF — malware analysis report

Static analysis result for SHA-256 c44651f3b36712f4…

MALICIOUS

PDF

92.6 KB Created: 2021-07-14 02:23:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 604f1b8258bca9fb6c7776ece197d508 SHA-1: 37c693530d773933ad4bab9b4286e24b1f0c921c SHA-256: c44651f3b36712f4e34f73bba58dd5e7fb7b8d8388f2d526d89c42163ba1b21a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document functions as a link farm, directing users to numerous compromised WordPress upload sites and other potentially malicious domains. The presence of multiple external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a strong intent to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://40parables.com/wp-content/plugins/super-forms/uploads/php/files/dcd592a395051188111ec439261638bb/nuratokitirefo.pdf In PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/e104b5202923ba0f501024097255552c/33341142930.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202105/file/48758393805.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/99ddc7023789e0247a229483ffbc056e/kozudojodozutaxo.pdfIn PDF document text
    • http://tylincms.com/userfiles/files/171801283.pdfIn PDF document text
    • http://himalayakebab.com/shipinc/userfiles/files/demetoluduxudu.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/jj421etgskgrpmaj2rf3bqtao8/sevix.pdfIn PDF document text
    • http://alacarte-design.de/userfiles/file/xuparamiwelinufezitisufev.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/1293brua2hst75iamvq20glsf4/70123751568.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/a440f09454293ded836aa65d1a4d0c74/71439440019.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d54ef57addb---88493082614.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3bf0a3f42---fixugedizidaxubigakekeve.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d646282e7---xavekexot.pdfIn PDF document text
    • https://xn--fiqa735be48e.com/upload/files/21783074775.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160a52436dd9e4---7495313971.pdfIn PDF document text
    • http://msamerica.net/clients/873634/File/47210169926.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071f98d3c634---rozixarif.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/delavivitigexiv.pdfIn PDF document text
    • https://aitalk.vn/upload/files/73345122417.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/bevig.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a244195260b---35967478438.pdfIn PDF document text
    • http://myafmc.com/clients/a/a5/a51d49d85de18111a3d718c63a5e5081/File/visemasavikizusijulizu.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/lemovero.pdfIn PDF document text
    • http://mitcostruttori.it/userfiles/files/zumefofejilu.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/8d466f6ddc7e7c563fdb9ca0b02f800e/jovojoloboto.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=leaders+and+managersPDF 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_off00010955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10955 10192 bytes
SHA-256: 730549c3c245c0a2df1c9fb28d38b6fb8d96a17411e63668e794382da894344f
font_01_sfnt_off00011fd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD5 17516 bytes
SHA-256: d5470897a4c27ef53929776102320a62f67c7ef4e94dec1792d31a24c3bb3b9e
font_02_sfnt_off00014d7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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