Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2e21f6d1e2ec7f1…

MALICIOUS

PDF

72.6 KB Created: 2021-09-17 19:44:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8c6540d8da0c845de3cd577559d3f13d SHA-1: c9ba90883e209fa4bab64ab0ee7699d310753cca SHA-256: f2e21f6d1e2ec7f1f8024e9452a4dbb9c3d19fc59334b7e2e5056a571c35e393
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to a link farm, indicating a likely attempt to redirect users to malicious sites. The PDF's structure and embedded links suggest it is part of a phishing campaign or a distribution mechanism for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://rpdev.org/ckfinder/userfiles/files/91451561942.pdf In PDF document text
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/83949226792.pdfIn PDF document text
    • http://garmaclima.com/uploads/ckfinder/files/zasanubisiregajakamajipa.pdfIn PDF document text
    • https://mujeresenmovimientoplus.com/userfiles/file/wadogoxupojezolife.pdfIn PDF document text
    • http://www.luna1956.com/images/library/File/muzifopaluwol.pdfIn PDF document text
    • http://mvpbuilding.com/userfiles/file/jerakosebokufo.pdfIn PDF document text
    • https://abcelectricalonlineshop.brilliantwebtech.com/userfiles/files/bukagorurusoxabuta.pdfIn PDF document text
    • https://www.artikel238.nl/emmwebbit/resources/ckfinder/userfiles/files/rubunotatomusapanozako.pdfIn PDF document text
    • http://besteva.com/upload/files/ketoduzepolab.pdfIn PDF document text
    • https://angel-juicer.com/FileData/ckfinder/files/20210909_0F63499F5D28A423.pdfIn PDF document text
    • http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/91016154138.pdfIn PDF document text
    • https://bakotech.at/uploads/ckeditor/files/lazamokisodilije.pdfIn PDF document text
    • http://natpuedu.in/userfiles/file/1900540573.pdfIn PDF document text
    • http://xn--3bsx3iw22bmot.com/filespath/files/20210917065426.pdfIn PDF document text
    • http://mitchelllawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mosafovumugotobizomesiru.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/16143f6b90c83a---76771537727.pdfIn PDF document text
    • https://jamuiboe.com/webroot/upload_media/gipufutikelimunibijut.pdfIn PDF document text
    • http://bright-inter.com/file_media/file_image/file/51670781837.pdfIn PDF document text
    • https://floridagreatescape.com/media/file/xadabimojatovegexej.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/86b43c806ce4af91aba25849a4053606/dowolixepelenikib.pdfIn PDF document text
    • http://progettocecinacuore.it/writable/public/userfiles/file/wunejuxila.pdfIn PDF document text
    • https://landtop.com/filespath/files/20210911191113.pdfIn PDF document text
    • https://ijfbacknumber.com/editor_up/febetugifeludibipewip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=123movies+friends+season+8PDF 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_off0000b7cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7CD 10892 bytes
SHA-256: c77d77b7b505d15869ae419fbccceeb05b5515b62141e5b307c5abd53e293c38
font_01_sfnt_off0000d111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD111 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE923 17216 bytes
SHA-256: 635bb46239a93fe14b3bcf6e1fc8577d8e6f4d2f47fc6c4bf51ac73287cebfc5