Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d9cf39e5306eba0…

MALICIOUS

PDF

70.4 KB Created: 2021-09-16 17:50:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ca1f6b6caf225d3127ce84a00c8e4a4c SHA-1: 5a66095d626fd4d28d9cc914b4c3c5a121ce7ad7 SHA-256: 0d9cf39e5306eba0fad674148c11d0ab9488651a857b52c3c23c23e81ccec0f8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high number of embedded URLs pointing to disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://philabc.ru/uplcv?utm_term=123+free+movies+4u PDF link annotation
    • https://autopsrus.aerovents.com/ckfinder/userfiles/files/gexenidal.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/vofisepojelolamedas.pdfIn PDF document text
    • http://linhkienhunganh.vn/luutru/files/67444927120.pdfIn PDF document text
    • http://weiddy.com/uploads/files/202109112151117020.pdfIn PDF document text
    • http://ablerexthailand.com/userfiles/files/73953317326.pdfIn PDF document text
    • https://asiquim.com/ckfinder/userfiles/files/jejavorexamupakikor.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/79574975015.pdfIn PDF document text
    • http://demo-enriquemora.shopcloud.es/ckfinder/userfiles/files/lejutefisiwuzepozogin.pdfIn PDF document text
    • http://vongtaygiay.net/media/ftp/file/kitofapaxagemizona.pdfIn PDF document text
    • https://xn----8sbcehyodmtf1czh.xn--p1ai/userfiles/file/3298948727.pdfIn PDF document text
    • http://medizator.ru/ckfinder/userfiles/files/suvetowaxebuj.pdfIn PDF document text
    • http://lnhaihui.com/userfiles/file/20210910012506_605570625.pdfIn PDF document text
    • http://www.dereformasenalicante.com/archivos/files/xezedodamuw.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/wuzapufuge.pdfIn PDF document text
    • http://ellenia3.eu/userfiles/files/jakujef.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/joxozozenalavajibubusalo.pdfIn PDF document text
    • https://nbc.com.vn/ckfinder/userfiles/files/395276407.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/8265548463.pdfIn PDF document text
    • https://przygodanaukrainie.pl/admin/ckfinder/userfiles/files/jonebelolorefipetopulilip.pdfIn PDF document text
    • http://www.leposeur.fr/site/upload/ckfinder/files/bukogurenutona.pdfIn PDF document text
    • https://il-gusto.com/images/file/subodutegis.pdfIn PDF document text
    • http://erictex.com/ufiles/files/piruwevowod.pdfIn PDF document text
    • http://travelcenterpuntos.com/campannas/file/dasubesurabir.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_off0000b3dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3DC 15612 bytes
SHA-256: bed2997bd611a082d738041bc1ab1bc772db47fb4726155c67b1820ec255dd27
font_01_sfnt_off0000dc32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC32 10456 bytes
SHA-256: ca3b5ea8b930533432b73a7ec25b0bd820f85890ca53f5059496bbf7c31afa8f
font_02_sfnt_off0000f41c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF41C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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