Malicious PDF — malware analysis report

Static analysis result for SHA-256 70174abb5c46de49…

MALICIOUS

PDF

76.1 KB Created: 2021-09-28 13:55:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f3a9713dcb522f2be2a01ab7edaac186 SHA-1: 3fbe4b5a06dc665504fac79eca0d78bc473fbfe6 SHA-256: 70174abb5c46de49eb4090eac9d7af1283e1c69f5346a178c0a52923583d3926
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to external PDF files hosted on various domains, suggesting a link farm or redirection mechanism. The presence of external URIs and the ML classification strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 5

  • 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.
  • 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://pnlestari.com/visitbali/image/files/579594923.pdf
    • https://buzascsaba.hu/userFiles/file/97486306074.pdf
    • https://sahodayabbsr.com/test/fckeditor/file/jadere.pdf
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a0d891bae5---girezuwodi.pdf
    • https://khonggiansachhanoi.vn/uploads/files/76317531041.pdf
    • http://trevelci.ru/ckfinder/userfiles/files/71890447818.pdf
    • http://anipetkingdom.com/webroot/img/files/gujowopoluruzepivadex.pdf
    • http://telekommarketing.com/firme_data/files/fetaditamupagizefomuzixe.pdf
    • https://balajitutorial.com/admin/userfiles/file/96708989143.pdf
    • https://jaukiaplinka.lt/ckfinder/userfiles/files/33570339254.pdf
    • http://rfaaa.com/UploadFile/file/20210916020046177.pdf
    • http://skiflogistics.ru/userfiles/file/95894377411.pdf
    • https://srsatta.com/ckfinder/userfiles/files/mivanufure.pdf
    • http://parmalab.it/userfiles/files/sozexajutuvitudesode.pdf
    • https://guptajimarriagebureau.com/userfiles/file/82632988317.pdf
    • http://mzch.pl/userfiles/file/jerebomus.pdf
    • https://dewalt-naradi.cz/media/upload/editor/file/tivaluwaxukugidilo.pdf
    • http://www.hydro-tg.pro/upload/file/62966728772.pdf
    • https://immobiliareincentro.it/allegati/file/koputamap.pdf
    • http://drentmedischadvies.nl/uploads/files/92765918094.pdf
    • https://shiprapublication.com/uniformkontakt/userfiles/image/files/fomupofegifi.pdf
    • http://geriatriccarenewjersey.com/userfiles/files/59517268817.pdf
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/v6qeq51bfqhk2khdukjt2t0lf9/29952606157.pdf
    • http://webinaris.net/ckfinder/userfiles/publics/files/48445982902.pdf
    • https://epagneuls-bretons.fr/caningest/images/file/90411409337.pdf
    • http://shlawllc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/68888074503.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=novel+my+lecturer+my+husband+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c181.bin
8764f3fd8b33e82d0e7f87fb6ce3e37c81f45ade68b68dad0d5925a2d3515a09		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC181 11188 bytes
font_01_sfnt_off0000db61.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB61 16792 bytes
font_02_sfnt_off0000f373.bin
0c6b193b08bb3cc07bca73f682c39b4ac04e5f92878335a5af17fdded54ae939		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF373 18352 bytes

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