Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e0532a74cce8383…

MALICIOUS

PDF

70.3 KB Created: 2021-09-13 05:55:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 390aebd02dc80a4952fac4347eb7d02e SHA-1: 90fb718a12ae318309b9c385d55ece3ddd751467 SHA-256: 0e0532a74cce838384f3056e2e4cda5e10f9b96f04e67bc41741b2784b813ae0
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. The presence of a link farm on disposable hosting, with multiple distinct hosts and UTM parameters, strongly suggests a phishing attempt to direct users to download potentially harmful files. No scripts were extracted, and the document body was unreadable binary data.

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 http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/16137469e24b78---xerupepiramezow.pdf In PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612ffcfe4971c---tamidazew.pdfIn PDF document text
    • http://www.siposferenc.hu/html/51847481753.pdfIn PDF document text
    • https://zenithoverseas.com/assets/userfiles/files/54866104552.pdfIn PDF document text
    • https://www.traitagri-solutions-alternatives.fr/ckfinder/userfiles/files/zozesigiwilarinotoped.pdfIn PDF document text
    • https://hoangnhataudio.vn/media/files/jaxuzabinoz.pdfIn PDF document text
    • http://rasciindia.com/firetech/ckupload/files/2915833047.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/somexolepabuxew.pdfIn PDF document text
    • http://kssi.ir/public/userfiles/file/78717123517.pdfIn PDF document text
    • http://helder-effect.nl/userfiles/file/35301075599.pdfIn PDF document text
    • http://dellalontra.it/userfiles/files/59067506879.pdfIn PDF document text
    • http://studioaba.net/userfiles/files/dalorubunebaduxufu.pdfIn PDF document text
    • http://verzorgingsindex.nl/images/uploads/riboxusuwagesuba.pdfIn PDF document text
    • https://golf-tout-terrain.com/publish/page/file/89010459533.pdfIn PDF document text
    • https://jamisonfurnace.ca/userfiles/files/19344110834.pdfIn PDF document text
    • https://alpinebadmintonacademy.com/ckfinder/userfiles/files/pesavutumoju.pdfIn PDF document text
    • https://emons-verlag.com/testarea/cwsCMSlight/media/files/jisepirifokuzupaluxedevuk.pdfIn PDF document text
    • https://strategieb2b.ca/userfiles/file/82925022669.pdfIn PDF document text
    • http://phanmemerp.vn/attachment/files/kovuv.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/77690011450.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/48416914901.pdfIn PDF document text
    • http://sieuthivatlieuhoanthien.com/upload/files/92551666780.pdfIn PDF document text
    • http://co-mit.com/uploads/files/15236821244.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=download+shellfire+mod+apkPDF 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_off0000b100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB100 16236 bytes
SHA-256: 7ede23065932d0a4b33efb50f5ba45c4fe0c12e3a0a2eb4f77535e5801a9639f
font_01_sfnt_off0000daae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f2c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C5 10844 bytes
SHA-256: 7a9b130e610f232431c0c7905f53b5a0bf7e9466087aaaa5ad6234cd48565d72

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