Malicious PDF — malware analysis report

Static analysis result for SHA-256 02f1ec6a479d8ab4…

MALICIOUS

PDF

85.9 KB Created: 2021-09-17 18:23:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1ea5cb50a0ec7bb1d2a5ce572870275c SHA-1: 6b085313103e00bb41c7046d8888caf02480a80f SHA-256: 02f1ec6a479d8ab4dfd41d5fddb61bb982877337027aee70b6aa9488477c23f6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which are structured to appear as file download locations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a tactic of using numerous low-reputation domains to host content, further supporting a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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=botw+amiibo+nfc+tags+download PDF link annotation
    • https://sindhuinvestment.com/ckfinder/userfiles/files/vikiwosomifejamawezetud.pdfIn PDF document text
    • https://giraffeng.net/infodaily/gen-ckfinder/userfiles/files/10433656688.pdfIn PDF document text
    • https://villanakarin.com/userfiles/files/10172788246.pdfIn PDF document text
    • https://balarampurblock.in/ckfinder/userfiles/files/mugusuwuburuvamafibefefes.pdfIn PDF document text
    • https://jackinthegym.com/uploads/files/202109052030198794.pdfIn PDF document text
    • http://silverspringabw.com/uploads/files/37399258744.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/161323c2b47441---19258641532.pdfIn PDF document text
    • http://ippinnudon.com/uploads/files/tufenatib.pdfIn PDF document text
    • https://whiteplacard.com/UserFiles/file/22205009057.pdfIn PDF document text
    • http://www.ks-klinika.ru/ckfinder/userfiles/files/34695652288.pdfIn PDF document text
    • https://totalsewa.com/userfiles/file/77504800560.pdfIn PDF document text
    • http://myredm.ru/uploads/file/3095326553.pdfIn PDF document text
    • https://goez3.com/10005001208290177/ckfinder/userfiles/files/53342994837.pdfIn PDF document text
    • https://blnk.eu/userfiles/files/97250638934.pdfIn PDF document text
    • http://stluciachamber.org/uploadedImages/contentImg/file/42208101920.pdfIn PDF document text
    • https://tonerihned.cz/userfiles/file/42390764142.pdfIn PDF document text
    • https://igruppe.no/ckfinder/userfiles/files/raxukuseferonizuka.pdfIn PDF document text
    • http://filippodelvita.com/demo/userfiles/file/navenitopowowiwugapiwav.pdfIn PDF document text
    • http://sweepinstyle.com/userfiles/file/mibijipisasunakesilojuxu.pdfIn PDF document text
    • https://servauto.fr/img/user/file/wodapix.pdfIn PDF document text
    • http://synfarm.com/upload/files/94095300946.pdfIn PDF document text
    • http://arcos-eff.it/userfiles/files/balifilowazeji.pdfIn PDF document text
    • http://showpalmedical.com/userfiles/65347552661.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/bezalu.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_off0000ed9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9B 10864 bytes
SHA-256: 05b379e01bc20ee4aee3e680c19c2dcaeba72076629da32028c4b51376a8d0aa
font_01_sfnt_off00010692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10692 16552 bytes
SHA-256: 96a00fe724a9f6876af5498bdc49a187086969b9de31beb5ad95ecb6796673da
font_02_sfnt_off000131a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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