Malicious PDF — malware analysis report

Static analysis result for SHA-256 c17d8cbc892a953a…

MALICIOUS

PDF

79.3 KB Created: 2021-09-09 22:56:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f707888d2f41f3e3a9bd898da46a50c1 SHA-1: 777540f21b3c68c85613d1f3d56d1d7b7fdf38bc SHA-256: c17d8cbc892a953a58ffd91056275073029e8184abcb97331278ea7779b21bd1
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains embedded JavaScript and numerous external URIs, many pointing to potentially malicious domains, suggesting it's used to redirect users to phishing sites or download further payloads. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the idea that the document is designed to host a large number of links, likely for SEO manipulation or to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • 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.
  • 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://viprealestatebrokers.com/userfiles/files/67491661244.pdf In PDF document text
    • https://eternalbliss.net/file/gitinu.pdfIn PDF document text
    • https://soudureornementalelauziere.com/upload/editor/file/70869712127.pdfIn PDF document text
    • https://dgssu.com/upfolder/e/files/20210904151516.pdfIn PDF document text
    • http://rejs2013.cycling-recycling.eu/imgturysta/files/wojakatibot.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/46611434906.pdfIn PDF document text
    • http://www.sintsprev-ms.org.br/ckfinder/userfiles/files/69966239566.pdfIn PDF document text
    • https://bandotrading.it/uploads/file/vekijabinute.pdfIn PDF document text
    • https://electrodomesticaruano.com/images/ckfinder/files/fifupime.pdfIn PDF document text
    • http://xn--80aaaghhaztbcd1agjgbccsgfftf.xn--p1ai/pict/file/forenav.pdfIn PDF document text
    • http://allasclub.com/campannas/file/sevomabezeranu.pdfIn PDF document text
    • http://montpellier-businessplan.com/mbp/upload/images/images/upload/ckfinder/rufofada.pdfIn PDF document text
    • https://banerjeetourspecial.in/ckfinder/userfiles/files/bubebijig.pdfIn PDF document text
    • http://3xlove.com/uploadfile/file/miruven.pdfIn PDF document text
    • http://riversedgefm.com/files/file/dumegavivoxamiluw.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613611894c2ef---mezowifo.pdfIn PDF document text
    • https://srmhomes.com/images/bulk_images/files/4170859688.pdfIn PDF document text
    • https://asiantms.com/ckfinder/userfiles/files/64648694879.pdfIn PDF document text
    • https://marikakozmetika.hu/editor_up/nefodufijigukotitajadime.pdfIn PDF document text
    • https://groupekheidri.com/ckfinder/userfiles/files/1641097126.pdfIn PDF document text
    • http://sjmhospital.org/files/js/ckfinder/userfiles/files/dujavezamadonevixib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=watch+boardwalk+empire+123PDF 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_off0000ce6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE6A 11160 bytes
SHA-256: cd7d86b76a6f8293e6f54f33c591a8e45e07aab59cc5f0df16e37078c4659ab2
font_01_sfnt_off0000e878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE878 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001008a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1008A 18136 bytes
SHA-256: 2ba58a157e169271d92d6654f1d4e8b76f2699fba9189d8ea09c0997d432c8bf

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