Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2dd47966cb34e2a…

MALICIOUS

PDF

82.0 KB Created: 2021-09-19 06:50:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 731f62166b56d69923c5975600ce8841 SHA-1: e3a1771946fb52d087832840725338086e5df972 SHA-256: e2dd47966cb34e2ae9a60434f06adc9fbaca14738bbf10f713f41ea45a3a8b9d
126 Risk Score

Malware Insights

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

The sample was detected as a malicious PDF by ML classifiers and ClamAV. It contains numerous embedded URLs pointing to external sites, some of which are flagged as link farms. The PDF structure and embedded content suggest an attempt to redirect users to potentially malicious websites, likely for phishing or to download further malware. No scripts were extracted, but the PDF's nature points towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://aftaplan.com/works/peepsparty/html/upload_files/file/vaxilisakadivegitaponowa.pdf In PDF document text
    • http://lisaarkinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sumurexas.pdfIn PDF document text
    • http://wowbond.com/upload/Fckeditor/file/5310066346.pdfIn PDF document text
    • http://hawaiisushi.iorderfoods.com/uploads/files/6551862345.pdfIn PDF document text
    • https://tideandtigers.com/ckfinder/userfiles/files/50580955771.pdfIn PDF document text
    • https://aokman-drive.com/d/files/21614374297.pdfIn PDF document text
    • https://olterus.com/contents/files/80160992703.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/16132c8878f164---73984294238.pdfIn PDF document text
    • https://bnbcostaverde.it/userfiles/file/nepodixumelarujobusoli.pdfIn PDF document text
    • http://tomaszskiba.com/userfiles/file/gubebije.pdfIn PDF document text
    • http://logo4you.dk/userfiles/file/jilidejiwuravane.pdfIn PDF document text
    • https://terlickodds.cz/www/www/fckphotos/file/71277156453.pdfIn PDF document text
    • http://myappartement.de/web/editor/files/vutidexademuli.pdfIn PDF document text
    • https://ecotranslation.ca/upload/editor/file/26813890184.pdfIn PDF document text
    • http://avon-bratislava.com/files/files/lisamoxajufidebeliluba.pdfIn PDF document text
    • http://www.oomewatersport.nl/upload/files/dolobowenelipilinube.pdfIn PDF document text
    • http://www.oiseaubleu-promo.fr/userfiles/file/tezupidokiruvugiveva.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/161324c0d1c809---nudulawifuripijefiwupi.pdfIn PDF document text
    • http://orem.mn/uploads/files/20374855762.pdfIn PDF document text
    • https://linhquan-group.com/upload/ck/files/rirufiwagokudawuwatumoxap.pdfIn PDF document text
    • https://nichecnk.leaddeehub.com/userfiles/files/82236217713.pdfIn PDF document text
    • https://petrovsky14.ru/docs/files/nowawonifefewojejufura.pdfIn PDF document text
    • https://www.terraton.com.my/ckfinder/userfiles/files/51269589502.pdfIn PDF document text
    • http://clickvay.com/upload/files/35723312376.pdfIn PDF document text
    • http://benrassam.com/uploads/files/29047371932.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=score+hero+apk+free+downloadPDF link annotation
    • 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_off0000db61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB61 17824 bytes
SHA-256: 20c9d7890c892fdceb92cc87021eec996d6e414b3336415947642db15fe1ae65
font_01_sfnt_off000109a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A4 10612 bytes
SHA-256: e56fffb70318500be796a71f6342be2a62645f08e96181acf012f917058bdfdc
font_02_sfnt_off000121e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1