Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b2d77d178b55e7d…

MALICIOUS

PDF

77.0 KB Created: 2021-09-16 16:02:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 92c326f266c4503bbf1fd74ba03e1097 SHA-1: 4a555294fdb8160d393667c9a042ecea538d634c SHA-256: 1b2d77d178b55e7d06ccc8240ea9de8ff49f91a6df033d8bed0a8fe05b806315
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs that point to a link farm, suggesting a phishing or malware distribution campaign. The PDF structure and embedded links indicate an attempt to redirect users to potentially harmful content hosted on various domains.

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://fullmagicweekend.com/ckfinder/userfiles/files/67905618448.pdf In PDF document text
    • http://ruiqingchem.com/upload/files/91213141047.pdfIn PDF document text
    • https://rts-wm.com/ckfinder/userfiles/files/mikepovukefoxufoxed.pdfIn PDF document text
    • https://booburger.myagenda.cz/pictures/editor/files/wejajobajosuwezeme.pdfIn PDF document text
    • https://jck.ro/userfiles/file/67397448114.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613244ced349c---puxexinexodibadorewogigo.pdfIn PDF document text
    • https://drosamahetta.com/userfiles/file/90128207723.pdfIn PDF document text
    • http://penzionriverside.cz/files/file/devipiwom.pdfIn PDF document text
    • https://beaszemin.com/files/rujepinerutatetanal.pdfIn PDF document text
    • http://www.lircai.com/web/inline/file/wolulubenemijiwegupavom.pdfIn PDF document text
    • http://alpes-de-haute-provence.proximeo.com/ckfinder/userfiles/files/89781275479.pdfIn PDF document text
    • https://gamepinleri.com/calisma2/files/uploads/puzijupegetasibubidavogaw.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/vifidubugupanifezezabino.pdfIn PDF document text
    • http://ipcmanpower.com/admin/style/images/userfiles/file/68424362244.pdfIn PDF document text
    • https://travelinnsuites.com/nbloom/fckuploads/file/leraza.pdfIn PDF document text
    • https://galaxytraining.examinationonline.com/files/luxijomizeguxi.pdfIn PDF document text
    • http://nguyenthaotech.com/upload/files/96945793906.pdfIn PDF document text
    • http://steelbo.com/uploads/admins/u0/files/20210912195253.pdfIn PDF document text
    • http://rebizplus.com/userfiles/file/lonidupewefub.pdfIn PDF document text
    • http://zamgph.com/uploads/file/090528544706.pdfIn PDF document text
    • http://xetaihyundai.net/upload/files/woxisitogizap.pdfIn PDF document text
    • http://velomagazin.hu/UserFiles/file/55140672212.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=porque+fracasan+los+paises+libro+pdfPDF 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_off0000c72f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC72F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000df46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF46 10904 bytes
SHA-256: 613001c5d7b16814f4622da336736b6c5199c4a7e186d8d931729bb537d89e48
font_02_sfnt_off0000f821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF821 17692 bytes
SHA-256: 75fa9d11cb64085a69cf68a98f1a9b79c96225c6aa197333cb3357de74c40439

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