Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecce297689ec0c60…

MALICIOUS

PDF

69.3 KB Created: 2021-09-26 02:45:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 84ae4e807ee4593c5bda36ebc5c37eed SHA-1: b7fac8c7cd83b2438e89d2885b4550e8cf1cab79 SHA-256: ecce297689ec0c6039d3eb043faf745a20871bcf1f1ac6469eeb8e18566a31a0
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. It contains numerous external URIs pointing to disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is part of a phishing campaign or a downloader for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://garglob.ru/uplcv?utm_term=angry+birds+world+tour+apk+download PDF link annotation
    • https://myagenda.myagenda.cz/pictures/editor/files/55885219286.pdfIn PDF document text
    • https://dottoridegregorio.it/public/file/wezeduwizarofeloj.pdfIn PDF document text
    • http://hicoweld.com/shop/fck_file/file/rufotoparazebelakejekosub.pdfIn PDF document text
    • http://fotografoenricogiampieri.it/userfiles/files/bemibuwosagavesetud.pdfIn PDF document text
    • http://matras-devison.ru/upload/file/72426995730.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/tagijemubejara.pdfIn PDF document text
    • http://kawana.tech/userfiles/file/fuxitipugigokezejolopimik.pdfIn PDF document text
    • https://vrindaindia.com/php/joseph/uploads/file/famaveviletolenugudinite.pdfIn PDF document text
    • http://uhy-th.com/image/upload/files/zanugabuzuvusisa.pdfIn PDF document text
    • https://ottopianos.nl/files/4919077235.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/94d38cd1fb0a31d8cfb050d4fea5ca09/bapot.pdfIn PDF document text
    • http://leylatoprak.com/userfiles/file/fobinegidabawumunizag.pdfIn PDF document text
    • https://sandp-engineering.com/ckfinder/userfiles/files/nogefavevezo.pdfIn PDF document text
    • https://doan295doson.vn/namthuan/images/news/files/96826205996.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614dab8f68da2---leguzebuzebojowokefo.pdfIn PDF document text
    • https://hlj-vibration.com/uploads/image/20210917/files/20210917104543.pdfIn PDF document text
    • http://bsa-billiard.by/images_from_html_editor/file/87958946422.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/userfiles/file/xubumufokorewod.pdfIn PDF document text
    • http://studiodispirito.it/userfiles/file/rozav.pdfIn PDF document text
    • https://dubigroup.com/admin/fckeditor/editor/filemanager/connectors/upload/file/bapivufawumerudelujok.pdfIn PDF document text
    • http://vincitydata.com/uploads/ckfinder/files/65554581906.pdfIn PDF document text
    • https://blnk.eu/userfiles/files/perilos.pdfIn PDF document text
    • http://biosafety.biz/ckfinder/userfiles/files/88485545729.pdfIn PDF document text
    • http://warwick-ems.org/userfiles/file/71334680139.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_off0000af19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF19 15768 bytes
SHA-256: cf15dbdfdea3a9815e33bcd581b014ee0ad8f2bf48a1540a2ee2939c1ef7c438
font_01_sfnt_off0000d662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD662 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE79 10948 bytes
SHA-256: 321f25cc8f843f37d88ddf9951c9a6658321e852bb3ab757f53b0c2afb8f8ce3