Malicious PDF — malware analysis report

Static analysis result for SHA-256 62289a2a359b7235…

MALICIOUS

PDF

82.5 KB Created: 2021-09-09 12:18:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3da620b2dcb31218183913f6298194ce SHA-1: 4367abef1fc3c408aa63353d0650908cae2a9ae7 SHA-256: 62289a2a359b72359f1eac88bd86285497d00931637b0ff9b4dd2176c18d58a2
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. It contains numerous embedded URLs, many pointing to potentially disposable domains, suggesting a link farm or redirection scheme. The presence of a QR code lure heuristic further supports a phishing-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 6

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://niezapominajkowo.eu/userfiles/file/finolalazinajik.pdf In PDF document text
    • https://mtmnetwork.net/uploadEditor/files/61909141664.pdfIn PDF document text
    • http://rwdwebwebdesign.com/img-aim/files/19026307524.pdfIn PDF document text
    • https://nitm.ac.in/nitmeghalaya/ckfinder/userfiles/files/melifizojifonojobe.pdfIn PDF document text
    • http://bzws.zhanyougame.com/ckfinder/userfiles/files/zajakufoko.pdfIn PDF document text
    • http://iehyun.com/editorupload/file/13165112666.pdfIn PDF document text
    • https://www.moxiclear.com.au/application/third_party/ckfinder/userfiles/files/64041288674.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/96324435026.pdfIn PDF document text
    • http://veiligheidssloten.nl/ckfinder/userfiles/files/wofanuzovewabamenugedal.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133122294c20---vuduwugapejotutasixe.pdfIn PDF document text
    • http://leasingtowers.com/ckfinder/userfiles/files/robudumi.pdfIn PDF document text
    • http://cayxaotamphan.net/userfiles/image/file/79815438189.pdfIn PDF document text
    • http://trip-sale.ru/userfiles/file/11885059076.pdfIn PDF document text
    • https://noithatkuongthinh.com/uploads/files/kupexaxuzakikanawojobipab.pdfIn PDF document text
    • https://clinicaabrahaoosta.com.br/ckfinder/userfiles/files/kozojatufagokaw.pdfIn PDF document text
    • http://cosonhuath.com/hinhanh_fckeditor/file/texaxodilajorav.pdfIn PDF document text
    • http://clevio.biz/fckUpload/file/wabilozepuxituwujen.pdfIn PDF document text
    • http://hoteldanang.vn/uploads/images/files/kusolekofar.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/cc3a96af0837d0ce950e46999f6ee07f/ximiw.pdfIn PDF document text
    • https://suncables.co/images/file/77779049663.pdfIn PDF document text
    • http://rjbmachinery.com/d/files/36302971154.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=android+document+scanner+sdk+open+sourcePDF 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_off0000d9c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D7 10800 bytes
SHA-256: 49eb3424ed4823e15ae5a1128e1cc86274da45767e4bf53789e63d63328e855b
font_02_sfnt_off00010ac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC2 19052 bytes
SHA-256: d057b727881611ec224e5de693660a77f2a766e7822681ecdcf1e1196e606783

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