Malicious PDF — malware analysis report

Static analysis result for SHA-256 aec6bf9a66429171…

MALICIOUS

PDF

90.2 KB Created: 2021-09-05 02:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: da978be10b424cad1930ee4b1d4097c2 SHA-1: 1e2c2e5c9148819acd864353c2f7e5241e65e1a0 SHA-256: aec6bf9a66429171a134ac3d3450dd34951275731842698b89221bf64e6460cb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, further supporting malicious intent. While no scripts were directly extracted, the presence of numerous external links and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160847bed739db---lajexewalamabaguxijemugif.pdf In PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c12771bf0---dolubudiwonorekafef.pdfIn PDF document text
    • http://rucodelniza.ru/userfiles/file/83118927317.pdfIn PDF document text
    • http://doubler-son-capital.com/photos/files/bebupifavigi.pdfIn PDF document text
    • http://turbooto.vn/upload/files/19568517294.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/rebizumujavipojazu.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b26ea6eea3---30422118249.pdfIn PDF document text
    • https://avvocatoboretti.it/file/84386178680.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/7f88a85d67e7a0076519389e63156525/75150888042.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/93336222713.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/64ecc2bd0ff3900028b28da2ea151ca7/49825100737.pdfIn PDF document text
    • http://kingsfinancialconsulting.com/userfiles/file/paban.pdfIn PDF document text
    • https://dvg.asia/ckfinder/uploadfiles/files/48413098659.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/05/22/file/20210522_220925_109.pdfIn PDF document text
    • http://okna-dvere-online.cz/media/upload/upload/file/woregiloligoxufotefe.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16078973bdeaf4---wogifepinagipowepelu.pdfIn PDF document text
    • http://turnwealthy.com/ckfinder/userfiles/files/zafefafubogagarerewipa.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/9258f09292fd017b17630e87363867d8/vupegugakufugogiwuxi.pdfIn PDF document text
    • http://mispuntossaga.com/campannas/file/zisevugudoluxus.pdfIn PDF document text
    • https://rajakeempat.com/contents//files/73870077008.pdfIn PDF document text
    • https://www.cosanuesa.com/componentes/editor/ckfinder/userfiles/files/rowokibodekajuvibib.pdfIn PDF document text
    • http://tjsijiqing.com/ckfinder/userfiles/files/2021/0905/f2401c43beb0978a5824bb4ba974bf86.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=gestion+de+proyectos+libros+pdf+gratisPDF 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_off0000f566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF566 11088 bytes
SHA-256: bed9fb9063550ac80c1eb1010b80ae9ec08739e18200f43e1263daf8ebb27989
font_01_sfnt_off00010efc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFC 20668 bytes
SHA-256: fe1d8e3d52ddc4b9ef14c8aa89786777917202a4c25570331bd6fa2d253f7e7e
font_02_sfnt_off00014317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14317 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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