Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d2f3a554f9de19d…

MALICIOUS

PDF

69.3 KB Created: 2021-09-28 09:05:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e31b6fe4fd477ff9cb253b47e701696e SHA-1: f574fbebe6fbef42bbcbf8307cb4d0d6c8d292af SHA-256: 9d2f3a554f9de19d55f7f755248fc289083058b8a453355697bcb40bedfd3f70
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 various domains, many of which are structured as link farms or disposable hosting, suggesting an attempt to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://laborke.ru/uplcv?utm_term=running+princess+game+download+free PDF link annotation
    • http://pizzeriagiganti.ro/imagini_ws/motenakifaradidiv.pdfIn PDF document text
    • http://erisalaw-chicago.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/61832490715.pdfIn PDF document text
    • http://elard-group.com/ckfinder/userfiles/files/478049759.pdfIn PDF document text
    • https://www.ewdel.cz/ckfinder/userfiles/files/rudamatozu.pdfIn PDF document text
    • http://sosonomo.com/ckfinder/userfiles/files/17982808819.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb8af5dc75---gavilufixefivus.pdfIn PDF document text
    • http://autovoda.ru/upload/files/89825314424.pdfIn PDF document text
    • https://eurotig.ro/file/14987294571.pdfIn PDF document text
    • http://solemarservizi.it/userfiles/files/vuleworenusosanapurafugo.pdfIn PDF document text
    • https://pass-eco-energies.com/ckfinder/userfiles/files/jelivap.pdfIn PDF document text
    • http://radis-rrl.ru/userfiles/image/xovosaxirenonenuviberugip.pdfIn PDF document text
    • http://vwtint.com/userData/board/file/59628571678.pdfIn PDF document text
    • https://beauty-full.ru/uploads/files/67647413031.pdfIn PDF document text
    • https://medarbindia.org/ckfinder/userfiles/files/34228921821.pdfIn PDF document text
    • https://pontus-sd.eu/uploads/file/megabazogezivedebegupo.pdfIn PDF document text
    • http://uni-soar.com/userfiles/file/saxepafevotobazoxipezema.pdfIn PDF document text
    • http://upakuika.com/img/file/79210761929.pdfIn PDF document text
    • http://dainichiji.com/upload_ckr/files/23810577092.pdfIn PDF document text
    • http://linkipt.com/_UploadEditor/files/31395296709.pdfIn PDF document text
    • https://hanomanberjaya.com/contents/files/77324726146.pdfIn PDF document text
    • http://greenld.com/userfiles/gidezagag.pdfIn PDF document text
    • http://techsystem.gr/data/uploads/ckeditor/files/pirinavurofodifisumufud.pdfIn PDF document text
    • http://mientaytourist.com/uploads/files/pamavomopomelu.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16140049c8cde9---mokuremuretibed.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_off0000afe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFE1 14964 bytes
SHA-256: f4125c0d5906b17167ae53b2b203e1ee2ea9e93b8103be129f54293a0802b8ef
font_01_sfnt_off0000d5d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000edea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEA 11096 bytes
SHA-256: 1238cd9268bb3a7d04f2769cb02487f695a998de79ee56c9e2d70c24775ad90b

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