Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fa68cb19b53fd33…

MALICIOUS

PDF

80.0 KB Created: 2021-09-10 09:30:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 41bfb2a25292208b1fa77fb4b5dd42ca SHA-1: 1ccce71a3dc22a03b3b9b002fed390cf301e9679 SHA-256: 5fa68cb19b53fd337fd69de335fcf417542f9eeb99d5cecd73e539cea6eb6b5b
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://f-okinawa.com/img/tmp/file/39937341501.pdf In PDF document text
    • https://pavillonwohlen.ch/userfiles/files/siguzajoleroza.pdfIn PDF document text
    • https://www.hkfew.org.hk/ckfinder/userfiles/files/xapum.pdfIn PDF document text
    • http://xn--dlek-5qa.com/admin/UserFiles/file/44919934639.pdfIn PDF document text
    • https://www.corpeverest.com/ckfinder/userfiles/files/tagowori.pdfIn PDF document text
    • http://roycraft.ca/userfiles/file/kumebatenajalofaxu.pdfIn PDF document text
    • http://labradory.pl/file/kafepukarevoxixapuzamipof.pdfIn PDF document text
    • http://maidichike.com/upload/files/15401989387.pdfIn PDF document text
    • http://dreamcatcherltd.com/userfiles/file/rirebuwuwoxuxat.pdfIn PDF document text
    • https://learningsolution.ca/userfiles/files/51137219027.pdfIn PDF document text
    • https://www.santaterezinha.com.br/js/ckfinder/userfiles/files/wazezujevegu.pdfIn PDF document text
    • https://cailux.lu/userfiles/files/konabilujo.pdfIn PDF document text
    • https://brianhigbielaw.com/UserFiles/file/momubulonizoz.pdfIn PDF document text
    • http://tries.cz/media/images/upload/file/wifodofikuzedibi.pdfIn PDF document text
    • http://stellar.ru/ckfinder/userfiles/files/dasabulitemukuzeb.pdfIn PDF document text
    • http://castel.lu/userfiles/files/rubozuk.pdfIn PDF document text
    • http://thedreams.cz/files/setebanepesulifovek.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/17d613cdf84eab4a31e3651d4ded053c/jezirerepinikazokisuj.pdfIn PDF document text
    • https://xn--fiqa735be48e.com/upload/files/10161907959.pdfIn PDF document text
    • http://elektrostroy.kz/ckfinder/userfiles/files/pewexolun.pdfIn PDF document text
    • http://www.naturhalles.fr/fckeditor/userfiles/file/54363738294.pdfIn PDF document text
    • http://web5gstore.com/Files/files/jiwital.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1613790d752fc2---xumugikizobolefenonuxo.pdfIn PDF document text
    • http://mydreamtuscanwedding.com/editor_up/85981935879.pdfIn PDF document text
    • http://velo.hu/UserFiles/file/wuwozilawevuxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=gta+v+pc+apk+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_off0000d66d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD66D 17412 bytes
SHA-256: 4b19191e2d50d09023cf08d558b090a9d4bdbf74af4f62fca676cc5759be26e4
font_01_sfnt_off0001034f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B66 10300 bytes
SHA-256: 4234507627a783f3df457b95a7d43c0f45a99c0d2968d39dca73f600c64661a2

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