Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e0f1821af51fe27…

MALICIOUS

PDF

83.4 KB Created: 2021-09-01 09:20:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5382347c76689402871c5eb1996facf8 SHA-1: 3643bdfab6ce2f79e0f62122180f0c25bcd354b7 SHA-256: 9e0f1821af51fe27580aade207fc8472b790915aea36cfd9dbb5286a4aaed9c5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. The document contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of 'utm_term' parameters in some URLs further supports the phishing lure, likely disguised as a movie download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://philabc.ru/uplcv?utm_term=bhoomi+tamil+movie+free+download PDF link annotation
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/5kcgkduuj0qt99rj830e3vivr5/jenezelazenirukitosufera.pdfIn PDF document text
    • https://tsafar.ir/basefile/tsafarir/files/fevumero.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160e1079590660---xumupovoruvobeziniwalorav.pdfIn PDF document text
    • https://cherrychile.cl/cherry/uploads/contenido/files/58344450955.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160da3c5e8c5ca---58872776498.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/64mrnsuc8q7fh18mhg2n4je7gm/14394272679.pdfIn PDF document text
    • http://roanfamily.net/clients/0/01/01b24a6c100194bbc8678883f3cd4a53/File/fokemumopikilajogudabet.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/e26f5fc78109605cc7c7a24e0787c87a/17463973019.pdfIn PDF document text
    • http://mardeestilos.es/fotos/file/37669549114.pdfIn PDF document text
    • http://maility.pl_adresuserfiles/file/17064701734.pdfIn PDF document text
    • https://cashcruis.ru/wp-content/plugins/super-forms/uploads/php/files/8bee8e1792aa0be74a7234b91dea208e/47707493480.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/7eaeecaecf1f05f109b3576c83d84099/jewoxaxijorasor.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/f14f8f3a49a2f4c78961fbca333b222d/zupeget.pdfIn PDF document text
    • https://www.stnedu.com/ckfinder/upload/files/97057726894.pdfIn PDF document text
    • http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/sokanomavavob.pdfIn PDF document text
    • http://kingsap.com/file_media/file_image/file/95342876897.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/k4ga2a56fc9nd9724nchas4g57/wakefufamugolivabop.pdfIn PDF document text
    • http://selfmadefilms.nl/userfiles/files/25899129707.pdfIn PDF document text
    • http://mikailang.com/userfiles/file/20210819093232_2100378064.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612b765834c9c---vawigisisa.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080362a2674f---lizatofutiguzodo.pdfIn PDF document text
    • http://webs123.com/userfiles/file/fajabevit.pdfIn PDF document text
    • http://askort.pl/Upload/file/73301645167.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5968dd24f---78364498400.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606caf076c3a8---dukepobeganamarusadi.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_off0000e278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE278 17520 bytes
SHA-256: c94b3d1f804d0454fbe389facedb94bd3df0c38dfa2a28f097b87a5cb71a8aa1
font_01_sfnt_off00010ff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001280e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1280E 10656 bytes
SHA-256: 6ab76230a951a7d9dc7994d3408726a381bcf6457e2a8451810e7221116152d4