Malicious PDF — malware analysis report

Static analysis result for SHA-256 598cd62129eef839…

MALICIOUS

PDF

80.1 KB Created: 2021-09-14 13:35:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 24bdec91d2d5b684e88052c3d3a65318 SHA-1: c66b22a8b198fc857c5436b5852ad175aba81ee6 SHA-256: 598cd62129eef83912c205349f220d871d5a05eef58f6fbba66f806ab8e4abb8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external URIs and is flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. The presence of a link farm on disposable hosting suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://chcial.ru/uplcv?utm_term=android+app+remember+passwords PDF link annotation
    • http://consulcongress.it/uploads/assets/file/lixubedogagotofu.pdfIn PDF document text
    • http://codienlanhtrangia.com/Images_upload/files/wetarimorolekaba.pdfIn PDF document text
    • http://watthaistuttgart.de/userfiles/file/vovonulopekijol.pdfIn PDF document text
    • https://drrajanmahtani.com/userfiles/files/zijugazakomivudebumelila.pdfIn PDF document text
    • http://dorapeyzaj.com/userfiles/file/22217909957.pdfIn PDF document text
    • http://xn--nellieskche-0hb.de/userfiles/file/77160497370.pdfIn PDF document text
    • http://edu-soft.ru/site/htmlimages/file/fisepiz.pdfIn PDF document text
    • http://jyjjapan.jp/files/ckeditor/files/fovujasupowopumutidoko.pdfIn PDF document text
    • https://millersexpress.com/userfiles/file/16728706071.pdfIn PDF document text
    • http://prakseologia.eu/userfiles/file/zupem.pdfIn PDF document text
    • http://i-harmonics.com/upload/files/vivibax.pdfIn PDF document text
    • http://lafenicealcamo.it/userfiles/files/6962144856.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16138ebd965b9c---tifevisinakisamitar.pdfIn PDF document text
    • http://caycanh.vn/images/fck/file/23922594567.pdfIn PDF document text
    • https://redengewinnt.com/userfiles/file/kumovuwujatagetavid.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1613cb440b450c---pefibidedovorasivokuje.pdfIn PDF document text
    • https://alicantea.centralcms.cloud/galeria/files/83486158506.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/14a4e90ca2368e4cdf1a746da10823e6/19353446396.pdfIn PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/xukomepupokezusakewozufo.pdfIn PDF document text
    • http://studiotecnicofrisoli.com/userfiles/files/pirafegaresisojekar.pdfIn PDF document text
    • http://efrex.cz/files/file/46143913599.pdfIn PDF document text
    • http://metalzilemboeventi.com/userfiles/files/xipuzipotoxosusi.pdfIn PDF document text
    • http://dreamwith.gni.kr/ckupload/files/somilakedivuk.pdfIn PDF document text
    • https://dcimx.com/files/42757964975.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_off0000d67c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67C 17236 bytes
SHA-256: e883485d7e0cf72e16221857699ff55f6bf548d1c655c76d0365833125050b61
font_01_sfnt_off000102ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CE 10616 bytes
SHA-256: e03f546393060bbaa27104e0fc824775fffa0b3e51d6aaae1b64fa5117190499
font_02_sfnt_off00011ad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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