Malicious PDF — malware analysis report

Static analysis result for SHA-256 e20af6d3a5f3ac70…

MALICIOUS

PDF

74.0 KB Created: 2021-09-14 05:38:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 92ed365444e6b64861092a0706d1cdf4 SHA-1: 9b4533129f0daec4443f0f260e5fd86aedbe07e8 SHA-256: e20af6d3a5f3ac70e501e35fc3250a0b9c9493f64d7c2cf40a1521af880b7715
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 external URIs pointing to various domains, indicating it functions as a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests the document's purpose is to redirect users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://crysiq.ru/uplcv?utm_term=punch+hero+apk+unlimited+money PDF link annotation
    • https://nazragame.com/calisma2/files/uploads/19330320434.pdfIn PDF document text
    • http://vangphutai.com/images/uploads/files/58120931897.pdfIn PDF document text
    • https://tahuacoop.com/cms_gpadmin2015/sgi_userfiles/userfiles/files/18177194730.pdfIn PDF document text
    • https://rosedreamholidayhomes.com/ckfinder/userfiles/files/91798042089.pdfIn PDF document text
    • https://exlite.it/ckfinder/userfiles/files/suxapiwodefanixonezo.pdfIn PDF document text
    • http://morakothotel.com/file_media/file_image/file/40166338476.pdfIn PDF document text
    • http://etkenkalip.com/files/fomusogatiroxelitonagab.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec17b82e24---jinofi.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/tuvubezefud.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/161399259457ff---21354376934.pdfIn PDF document text
    • http://www.farmaciapenil.es/userfiles/files/58504550392.pdfIn PDF document text
    • http://directartdeal.com/uploaded_files/userfiles/files/fakegubafe.pdfIn PDF document text
    • http://k3projekt.pl/uploads/userfiles/files/51800575633.pdfIn PDF document text
    • http://elitakhealing.com/ckfinder/userfiles/files/lasedutiromuso.pdfIn PDF document text
    • https://cosmopolitanhotel.lastrada.bg/uploads/wysiwyg/files/35130399997.pdfIn PDF document text
    • https://nieruchomoscikomercyjne.co/files/file/daralabomijesezuzigiwuri.pdfIn PDF document text
    • http://pereplanirovkaoblast.ru/pict/file/20218184472.pdfIn PDF document text
    • http://rheumatology.institute/upload/content/file/43743236679.pdfIn PDF document text
    • https://trungtamgiasuhcmmq.com/uplaod/quangtri/files/somivejebademulisame.pdfIn PDF document text
    • http://happy-land.hu/editor_up/71937882985.pdfIn PDF document text
    • http://machulski.com/public/file/nasizitixakab.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_off0000bdfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDFC 10916 bytes
SHA-256: 05cf153c8ff5d395088ee852301b27216683ecadaf3b2cfc454aca854cce95ea
font_01_sfnt_off0000d711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD711 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ef23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF23 16684 bytes
SHA-256: bad575b120bcce3213a8f3d55fb1c4eae2e2cb75126d0fc186e3d3f4cb1f8416

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