Malicious PDF — malware analysis report

Static analysis result for SHA-256 736e9c1d45e026ab…

MALICIOUS

PDF

73.7 KB Created: 2021-09-03 22:15:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 95ba103922279301f40058ef217f46a6 SHA-1: 6334ca0e8a5245c8594d0c7ed54b68ab78e337ce SHA-256: 736e9c1d45e026abf033b20b52bb7af4ee90798f81758348a8b1122545d48dd1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs pointing to compromised or disposable hosting. These links form a link farm, suggesting an attempt to direct users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://smidgel.ru/uplcv?utm_term=zebra+label+printer+gk420t+manual PDF link annotation
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8f14660af---gazuviratijarosalomure.pdfIn PDF document text
    • http://zetrade.cz/userfiles/file/65895767334.pdfIn PDF document text
    • http://thanhnienxp.com/vietkiendo/upload/file/relawalelarixepuxul.pdfIn PDF document text
    • https://birudongker.com/contents//files/7829760285.pdfIn PDF document text
    • http://m-styleauto.com/js/upload/files/37709553846.pdfIn PDF document text
    • http://www.bc-arman.kz/ckfinder/userfiles/files/kinubisirefes.pdfIn PDF document text
    • https://kientrucqhouse.com/uploads/image/files/xipufimojopopeza.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a31d7b96c---20507384400.pdfIn PDF document text
    • https://salvatoredivilio.it/userfiles/file/25751914929.pdfIn PDF document text
    • http://narnivet.com/userfiles/files/kopanolamofowek.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/f4qrpqe6uk99vut7urenq3rdmm/kejedoxamosepesagifi.pdfIn PDF document text
    • https://samsungdvmklima.com/upload/ckfinder/files/36885440164.pdfIn PDF document text
    • http://lungtransplantopen.com/clients/d/de/de7cc03d42bda6b8b84c8ac9728529bb/File/90905133132.pdfIn PDF document text
    • http://maciejabramowicz.pl/upload/files/file/jagovevadibowufupu.pdfIn PDF document text
    • https://lemanssrl.it/file/fupekufe.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/ecbc6494fe3a56232791d13033e630d8/lovavas.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9d863f53c---27274166605.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/3rqt2sdhugp9bret9hpt0rkt6n/livajemuvi.pdfIn PDF document text
    • https://mtydizayn.com/userfiles/file/rolijipevite.pdfIn PDF document text
    • https://burgaseguros.com/userfiles/file/17685525715.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609685a5752fa---12693079031.pdfIn PDF document text
    • https://lapdonline.org/file/26494476763.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_off0000be08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d61f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD61F 10920 bytes
SHA-256: 1e3105287e9414032b23fe114b645918b0cf81b68bf08f2ea9efa8e57e9499d9
font_02_sfnt_off0000ef3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3E 16616 bytes
SHA-256: ef05c7ec228d8ea633533dd95925bc54a398130851861a9e0607ec0dcd31b2a8

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