Malicious PDF — malware analysis report

Static analysis result for SHA-256 95aeecda817e8d3a…

MALICIOUS

PDF

81.6 KB Created: 2021-09-20 22:38:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 812694e4262309d6a0fa4cfec51943a3 SHA-1: 0d28c47eb785513fee808abe789f6df837b91816 SHA-256: 95aeecda817e8d3a870d4bbadbc183c5e83024b560ad6f1f06d722191af62770
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to external files, suggesting it acts as a dropper or redirects users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating a large number of links on disposable hosting, a common tactic for phishing or malware distribution.

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://kaimano.it/file/sinedipojadib.pdf In PDF document text
    • https://thisissati.com/userfiles/files/bimivapopidubuwekam.pdfIn PDF document text
    • https://www.poolsrus.com.au/application/third_party/ckfinder/userfiles/files/nutapunavuzebavurabek.pdfIn PDF document text
    • http://officeharbor.com/pdtInfo/tanepamifevixip.pdfIn PDF document text
    • http://ffarchitettura.it/userfiles/files/widizotosame.pdfIn PDF document text
    • https://energiadirect.pl/application/resources/ckfinder/userfiles/files/sevalixojakutex.pdfIn PDF document text
    • http://seatraderhk.com/userfiles/25075142818.pdfIn PDF document text
    • http://nhatrangpalace.vn/app/webroot/upload/files/59828536540.pdfIn PDF document text
    • http://paitoonbox.com/userfiles/files/mubedusowagi.pdfIn PDF document text
    • https://atlaskvartir.ua/data/uploads/files/kewefasifevesugo.pdfIn PDF document text
    • http://seteo-dechets.com/images/file/99160160689.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/86311082180.pdfIn PDF document text
    • https://tecnicadovolante.com/images/file/vasozamiziris.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/d67f4ad0c16cb4d1e81b4adb91895a59/59562590965.pdfIn PDF document text
    • https://cortopolis.ar/userfiles/file/duvelusitoderixumidotevib.pdfIn PDF document text
    • http://hugslock.com/app/webroot/img/files/58240144933.pdfIn PDF document text
    • http://warwick-ems.org/userfiles/file/nukerexonavafutuk.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/febimipinidutijoliruxuzun.pdfIn PDF document text
    • http://cameragiaminh.com/upload/files/40882021930.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16130f89247c38---guberezuta.pdfIn PDF document text
    • https://projekt-lesen.de/userfiles/file/gixitazijiwefejoxozemizin.pdfIn PDF document text
    • https://alebusph.centralcms.cloud/galeria/files/88713296240.pdfIn PDF document text
    • http://edituj.cz/res/file/gepepivububexozijosopo.pdfIn PDF document text
    • http://kuppersbusch.hu/userfiles/files/kebevoguziwabudusimijaku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=abiotic+elements+in+a+rainforestPDF 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_off0000da19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA19 17936 bytes
SHA-256: 2d713b3894e9ea8d14cf839eb6b260b66b332653a70733a3027e9d2ba16d5372
font_01_sfnt_off00010871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10871 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12088 10620 bytes
SHA-256: c5fe6b758beedb54f5e8baadf2da5d827d8fd8e0db3e04eb82c4654760f0f816