Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3e6191afe250bbd…

MALICIOUS

PDF

82.6 KB Created: 2021-09-20 23:13:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 38af450083edb65c8d0b0fc0a5e31112 SHA-1: 725c75ee8903ec09eb61daecee3c923b3bf556a4 SHA-256: e3e6191afe250bbda5858897025af979fb1cd9ecbf1406f5e31ff0ba1e8ca9bd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM suggests the document is designed as a link farm, likely to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution attempt, potentially using embedded JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://africalegal.nl/userfiles/file/22536909528.pdf In PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20210906134422.pdfIn PDF document text
    • http://hai-bi.com/uploads/files/202109191050158933.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613a85c3f0581---53366352141.pdfIn PDF document text
    • http://ebbers-schilderwerken.nl/uploads/files/jiwokavudaxebosinuko.pdfIn PDF document text
    • http://xhzhengli.com/upload/68892050685.pdfIn PDF document text
    • http://metamorfozyayincilik.com/userfiles/file/jelanolemaxiwi.pdfIn PDF document text
    • http://panhongbo.com/ckfinder/userfiles/site_eachfun_com/files/goduwitive.pdfIn PDF document text
    • https://sharkovinkom.com/sharkovinkom.com/ckfinder/userfiles/files/bejevapoje.pdfIn PDF document text
    • http://ghefoot.com/fckeditor_userfiles/file/74999641016.pdfIn PDF document text
    • https://harley.dataroom.tw/upload/files/gasobefibaxex.pdfIn PDF document text
    • http://hoanggiaphatland.com/uploads/image/files/pikibigifekapal.pdfIn PDF document text
    • https://sakkestadbil.no/userfiles/file/95225873055.pdfIn PDF document text
    • https://biserica-izvorul-tamaduirii.ro/files/59215688961.pdfIn PDF document text
    • http://qdjshg.com/files/file/gazelonop.pdfIn PDF document text
    • http://ocung.net/img/files/53106661580.pdfIn PDF document text
    • http://vasekurzy.cz/userfiles/file/92366299734.pdfIn PDF document text
    • http://ore-processing.ru/d/files/kokexaxolol.pdfIn PDF document text
    • http://briztravel.com/upload/files/66757766428.pdfIn PDF document text
    • http://wangyiphk.com/userfiles/bevoverinaxemagukipaf.pdfIn PDF document text
    • https://sapporomn.com/userfiles/files/7501444206.pdfIn PDF document text
    • https://egyseg.eu/ckfinder/userfiles/files/87653123360.pdfIn PDF document text
    • http://comp-art.ru/userfiles/file/penolirunuxumome.pdfIn PDF document text
    • http://hasdeu.md/data/userfiles/files/mumogajezimeto.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=filmora+go+hackPDF 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_off0000de80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF692 18456 bytes
SHA-256: 23aa726c81da2f299e19008c4f92c13cc118dce809b5a37ff4300a90a3a402d3
font_02_sfnt_off00012661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12661 10244 bytes
SHA-256: 43f041d6c566029c929f609b242c544f4d9f010b0bc38126fb725fadc9b3db7f

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