Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddc1599f95643c8f…

MALICIOUS

PDF

70.1 KB Created: 2021-09-20 05:36:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e17bb8f95d354dad8adcf34124a4d417 SHA-1: 47eed80e1737d250d89b0a2d1b64aa5836c5174e SHA-256: ddc1599f95643c8f3a57ec0442f6a0ea18f3c17a3aea3cb9a49bb36d1d110f9c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple disposable domains. While no scripts were explicitly extracted, the nature of PDF malware often involves embedded JavaScript for malicious actions, and the link farm suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 http://originalcheck.it/public/img_admin/file///82700159639.pdf In PDF document text
    • https://www.e-oswiata.olesnica.pl/ckfinder/userfiles/files/kagav.pdfIn PDF document text
    • http://xn--q20b13r9leepaeb.net/upload/file/202109160854145437.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16139b84abaa9d---jatuv.pdfIn PDF document text
    • https://aviatroglo.fr/IMG/file/29058743519.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/27541717045.pdfIn PDF document text
    • http://www.fred-robin.com/ckfinder/userfiles/files/rifopuju.pdfIn PDF document text
    • https://dennismaloney.ca/upload/editor/file/darizoxusadesel.pdfIn PDF document text
    • http://medianet2000.net/amm_prod/image_news_popup/file/difodoreri.pdfIn PDF document text
    • http://kp-technik.cz/ckfinder/userfiles/files/jolelev.pdfIn PDF document text
    • http://moderncarrent.com/user_img/files/87833304123.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/tibatijitoruguwuzijoroz.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16143b3f3405e0---69058788389.pdfIn PDF document text
    • http://nwatchonline.com/userfiles/file/vipifigexemogavanejonu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=android+phone+tools+softwarePDF 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_off0000affc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFFC 10660 bytes
SHA-256: feaf9bb67055b03be0d5676492a59dd347ea6d6208c6d29bfa601b4705060979
font_01_sfnt_off0000c869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC869 16600 bytes
SHA-256: 4a243cecdbddc6cf142da677287be090ceed7ea8c805fb663b507cd6a50bf387
font_02_sfnt_off0000f31a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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