Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebe5b2cf6f06e3cb…

MALICIOUS

PDF

81.5 KB Created: 2021-09-20 10:32:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ec962e9dafedf6df01ddda95d688448e SHA-1: a5c35c91c392f0a6ac57af0684cfbfc2e14059aa SHA-256: ebe5b2cf6f06e3cb0c4409bebdcb1903f0f0641f6ba35b6a724c494839f06d47
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which point to disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The presence of 'utm_term' parameters suggests tracking or redirection, common in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://krisoc.ru/uplcv?utm_term=themer+bot+telegram PDF link annotation
    • http://dinskayarealty.ru/media/file/87327445668.pdfIn PDF document text
    • http://hingliltd.com/userfiles/3158079908.pdfIn PDF document text
    • http://net-marketing.hu/images/files/dafinutovotupenod.pdfIn PDF document text
    • https://sindicav.com.br/ckeditor/ckfinder/userfiles/files/92507658330.pdfIn PDF document text
    • https://izyskately.ru/foto/ck/files/27746693636.pdfIn PDF document text
    • https://ytdrive.com/CKEdit/upload/files/75546449684.pdfIn PDF document text
    • http://kwong-cheong.com/userfiles/zidaximimij.pdfIn PDF document text
    • http://trumoi-khutrung.com/upload/files/kegiduxiduxemeborufuzaku.pdfIn PDF document text
    • http://intertravel.hu/_user/file/bivezapegazozuvoronugemig.pdfIn PDF document text
    • http://minhnguyenvn.com/uploads/userfiles/file/tomariforivutelokod.pdfIn PDF document text
    • https://erdenet.mn/userfiles/file/67642748178.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/65680807594.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/86559821758.pdfIn PDF document text
    • http://flapboxes.custompackageboxes.com/userfiles/files/soralas.pdfIn PDF document text
    • http://www.tlo.ntou.edu.tw/ckfinder/userfiles/files/66136456926.pdfIn PDF document text
    • https://cukimentescukraszda.hu/files/files/39183937200.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/5qkagn7rt4d14hh5of34js0d10/35963349212.pdfIn PDF document text
    • http://erex.hu/upload/file/noluru.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/161328a40366c4---sudalik.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/99717010714.pdfIn PDF document text
    • http://konferencii.org/web/uploads/assets/file/wonegevukapajamepotov.pdfIn PDF document text
    • http://www.bc-arman.kz/ckfinder/userfiles/files/62916689071.pdfIn PDF document text
    • https://ecohort.info/userfiles/files/pobeduxug.pdfIn PDF document text
    • http://bsinteriordesigner.com/userfiles/files/tidirexeladufosomipavu.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_off0000d522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD522 10292 bytes
SHA-256: 9eba13d22997fd8a2c154b19a43a3c7c164f69c022941c061035d6704080d628
font_01_sfnt_off0000ec4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4B 19776 bytes
SHA-256: b6fd85f4ed122cc37233149fc465d373c6992c5c6cec75138a0da15979dd32af
font_02_sfnt_off00012035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12035 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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