Malicious PDF — malware analysis report

Static analysis result for SHA-256 e479d83e890ce45c…

MALICIOUS

PDF

73.3 KB Created: 2021-09-16 09:58:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8f54819426410e68560d3fdb22b3e4cf SHA-1: ea13d6a88931f691c8beec7d7d7c5a9c5f81b9da SHA-256: e479d83e890ce45cbb786683130d1603412a1a3ea04847b6dee52c5c1a118d82
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to potentially malicious domains, characteristic of a link farm designed to redirect users. The presence of these links suggests an attempt to lure victims to external sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 https://asiantms.com/ckfinder/userfiles/files/xexalakozikosedewogole.pdf In PDF document text
    • https://www.koreayokogawa.com/ckfinder/userfiles/files/38702332118.pdfIn PDF document text
    • https://www.pelicanfinancialnetwork.com/ckfinder/userfiles/files/68774006955.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/papiminuti.pdfIn PDF document text
    • http://architettotoma.it/userfiles/files/57558638532.pdfIn PDF document text
    • http://izeninfo.net/admin/upload/files/toliwimimitedumebapip.pdfIn PDF document text
    • http://canadianartistic.com/userfiles/file/98581096221.pdfIn PDF document text
    • https://snoman.mb.ca/ckfinder/userfiles/files/fuliroxonasojatokeku.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1613f4a97d7837---87626658634.pdfIn PDF document text
    • http://rigassprotes.lv/uploadz/file/xosegoxavidil.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613b80617fe77---tinubawiwi.pdfIn PDF document text
    • http://americasbestwingspa.iorderfoods.com/uploads/files/34254261346.pdfIn PDF document text
    • http://lmalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xevikozedatusodefosuku.pdfIn PDF document text
    • http://esistore.com/userfiles/file/88286768408.pdfIn PDF document text
    • http://perfect-aerosol.eu/userfiles/file/nuxujun.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/vowasizez.pdfIn PDF document text
    • https://premium-house.uz/images/file/72916839044.pdfIn PDF document text
    • https://laps.pl/userfiles/file/dutuwe.pdfIn PDF document text
    • http://trustycctv.com/ckfinder/userfiles/files/49033603649.pdfIn PDF document text
    • http://maychaybocaocap.com/app/webroot/uploads/files/wiwevog.pdfIn PDF document text
    • http://studioambienteterritorio.it/userfiles/files/19189481253.pdfIn PDF document text
    • http://studioboscono.it/userfiles/files/63764430458.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=granny+vr+pornPDF 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_off0000bbb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBB2 9928 bytes
SHA-256: 5552576f8faaf2e3fc93799276e8b277dddcc12346967580c24e9909455ec5b8
font_01_sfnt_off0000d1bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e9cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CF 17492 bytes
SHA-256: 678963ffee80b7132463f1f19f569ee0c71ab7f86cdc0192eb6d085350bf9e55

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