Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e9444cdb4802632…

MALICIOUS

PDF

84.6 KB Created: 2021-09-19 00:09:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d47e03b6789d901ea618c79256cfde35 SHA-1: 3abe7a4e837780ce8bfb94f9d25b4b7a2ba86122 SHA-256: 1e9444cdb4802632c7f9ebeb30050cb1ab85872d2ac742a594758c368d77dd5e
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 disposable domains, indicating a link farm designed to redirect users to malicious content. The presence of external URIs and the link farm heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://smidgel.ru/uplcv?utm_term=pc+play+store+apk PDF link annotation
    • http://shukokai-voves.fr/userfiles/file/duvuxobupunun.pdfIn PDF document text
    • http://zamel2.pl/userfiles/file/31700083251.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/82918039127.pdfIn PDF document text
    • http://gptools.net/userfiles/file/tefizotijejekomudow.pdfIn PDF document text
    • http://andreaslasnik.com/data/files/18556632473.pdfIn PDF document text
    • http://edallyshop.com/upload/files/morejobodejitaw.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/974766f47f4148b46e224570dbc0adc7/guvuz.pdfIn PDF document text
    • http://blossomtour.net/FileData/ckfinder/files/20210910_809675C930EE7BE8.pdfIn PDF document text
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/78287010557.pdfIn PDF document text
    • https://k31szmq42-nu28.com/contents/files/7803921152.pdfIn PDF document text
    • http://npk-bypassdrr2.com/file_media/file_image/file/butebefepo.pdfIn PDF document text
    • https://sainaudit.mn/File/39042362481.pdfIn PDF document text
    • http://juvelyrikoscentras.lt/Files/file/wupodivowupagilelufevoj.pdfIn PDF document text
    • http://windmill-bv.com/userfiles/files/49553756037.pdfIn PDF document text
    • http://dkind.net/userData/board/file/56019957021.pdfIn PDF document text
    • http://hrudolf.com/userfiles/jiwivupola.pdfIn PDF document text
    • http://spielundlicht.de/content_provider/documents/files/lunekolokopexezukatevag.pdfIn PDF document text
    • https://agriplan-rs.com/dados/ckfinder/files/64346771154.pdfIn PDF document text
    • https://vialivonica.eu/userfiles/files/32478197242.pdfIn PDF document text
    • http://qdsenfeng.com/data/files/padiwalefiwofi.pdfIn PDF document text
    • http://nhasachconggiao.com/luutru/files/44145699866.pdfIn PDF document text
    • http://studiotecnicodavico.eu/userfiles/files/29083760979.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec14a40b7e---wezerasop.pdfIn PDF document text
    • http://branonperformance.com/ckfinder/userfiles/files/11599278919.pdfIn PDF document text
    • http://www.ciesol.es/ckfinder/userfiles/files/59354799764.pdfIn PDF document text
    • 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_off0000e72f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72F 10380 bytes
SHA-256: ecf627261a37cbaa0c2df18ceb597cd95a39c587652e41886342a62ea0b8b0bc
font_01_sfnt_off0000fef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF1 17588 bytes
SHA-256: dd839be4b5df2e7b2946cb05e638c574ad8e8294b58b679d85687231a1965491
font_02_sfnt_off00012cf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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