Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0c3a524cdf0704b…

MALICIOUS

PDF

83.4 KB Created: 2021-09-17 23:52:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d4c741f90ae9694dff2205cd9471b4f1 SHA-1: 6813fdaaa561f0473b378772e673a5da4683f188 SHA-256: c0c3a524cdf0704b54d0475d8df08ddcba96061c8cc9d4a7af5068645a39da2d
126 Risk Score

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://infrive.ru/uplcv?utm_term=oet+writing+for+nurses+pdf
    • http://www.dogwoodagility.nl/ckfinder/userfiles/files/jememigeluxuweb.pdf
    • https://batdongsandothanh.vn/luutru/files/94673999511.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/a90668721ebe80965162d90e71f0d66d/47556645093.pdf
    • http://khiconghoixuancong.com/Khicong/admin/userfiles/file/81566321224.pdf
    • https://ruh-center.ru/userfiles/file/tefavikavitamonal.pdf
    • http://0225674989.kad.tw/kads/ckfinder/userfiles/files/1861854380.pdf
    • http://willajarmar.pl/userfiles/file/dexariponabesetenosiwub.pdf
    • https://masihpt1.com/contents/files/54654533105.pdf
    • https://grootformaatspandoeken.nl/userfiles/file/7119415811.pdf
    • http://kwong-cheong.com/userfiles/bowijumozelosiwukuluto.pdf
    • http://www.sctiec.com/up_files/FCK/file/9776195165.pdf
    • https://dursunguney.com/userfiles/files/jolatojipomelesefofigebo.pdf
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612f372ebc705---vifusefodor.pdf
    • http://aatmicscience.org/asuserfiles/file/supex.pdf
    • http://showplus.ae/userfiles/files/bufemujejipenitarixojepe.pdf
    • http://xn--80aer5aza.xn--19-kmcm3c.xn--p1ai/ckfinder/userfiles/files/91289835754.pdf
    • http://solarexperten.ch/fckeditor/editor/images/file/lagamuturo.pdf
    • http://nhadep30giay.com/uploads/image/files/59136714648.pdf
    • http://fujavietnam.com/images/Download/sonofosogilakikeg.pdf
    • https://eventpro-kontraktorpameran.com/uploaded/files/82448654471.pdf
    • http://aurora-c.jp/files/files/mikuxuxavozonomuputi.pdf
    • http://skiflogistics.ru/userfiles/file/57879326883.pdf
    • http://ranch.pl/files/file/ragesudodotezizozekaroz.pdf
    • http://kfnmsz.com/upfolder/e/files/20210915215112.pdf
    • http://fastcredit.ge/userfiles/file/gadefigewevedovororipiw.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2b1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B1 16792 bytes
font_01_sfnt_off0000fac8.bin
87f025d7851d87c4d8df807943e2ad4b518c2d039e9583a7021fd8b00e888a61		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC8 10676 bytes
font_02_sfnt_off00011344.bin
c5abce164272796f1e3ffa74ea37a18781a74d45cbaad6ff2badf5a81bc4cb78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11344 17552 bytes

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