Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe6ecb6105c32e9e…

MALICIOUS

PDF

89.3 KB Created: 2021-09-09 04:55:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 62d438bc8d9aba2152da2c53b55545ae SHA-1: a6f50ea0d26f3d3fd2f86e6d28c953045a7f598e SHA-256: fe6ecb6105c32e9eb40e46e5f889e1e0a4f0c4911f5fb8ac1ff5c6a7a07e6256
176 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the nature of the heuristics point towards an attempt to exploit vulnerabilities or trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://wastran.ru/uplcv?utm_term=bollywood+full+movie+watch+online PDF link annotation
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb345504f5---rojenufopemivavobupegeni.pdfIn PDF document text
    • http://architectureanddesign.it/userfiles/files/xivanoviketoj.pdfIn PDF document text
    • http://shamayachts.com/upload/file/valenud.pdfIn PDF document text
    • https://ist-lb1.istanajp.com/contents/files/ferozevatuxogajulikigoz.pdfIn PDF document text
    • http://flairpens.ru/uploads/files/58320403787.pdfIn PDF document text
    • http://daithanhnam.com/upload/files/kadipedo.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1613942e08cd04---31733797673.pdfIn PDF document text
    • https://next-engineering.com/userfiles/files/vokugereduzirekoxiguvasa.pdfIn PDF document text
    • http://avvocato-callegaro.it/public/file/95536942468.pdfIn PDF document text
    • http://huseyindurmuslar.com/images_upload/files/bovigitopenafalatajuvoj.pdfIn PDF document text
    • http://clinicaveterinariaalbese.eu/userfiles/files/sibejo.pdfIn PDF document text
    • https://pacie.vn/web/uploads/files/82118686841.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec8823efd2---lopazed.pdfIn PDF document text
    • https://echipamente-scule.ro/userfiles/file/35360232630.pdfIn PDF document text
    • https://mimpishio1bet.com/contents/files/jipupitobapugeburaral.pdfIn PDF document text
    • http://yas-center.ru/userfiles/file/73107134123.pdfIn PDF document text
    • http://frigotechreina.com/userfiles/files/55197650023.pdfIn PDF document text
    • http://scarpatti.com/files/nokofakabagajeba.pdfIn PDF document text
    • http://findingthegrey.com/userfiles/file/51802532527.pdfIn PDF document text
    • https://msiutilities.net/documents/nanodiwugetosag.pdfIn PDF document text
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/94339324799.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/70136184656.pdfPDF link annotation
    • http://educaholistica.com/resources/img/imagesck/files/lutetubanatof.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_off0000f907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF907 10892 bytes
SHA-256: 55bde2fe6581868d02c302528264511398dbef9002dfd403da053320d36ea4ae
font_01_sfnt_off00011218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11218 17596 bytes
SHA-256: eb7b84202ee3a2f55aee5a2e181f9d5b007d0429a32646133ff37869eaffee82
font_02_sfnt_off00013f53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.