Malicious PDF — malware analysis report

Static analysis result for SHA-256 371b575aa3b1d171…

MALICIOUS

PDF

114.6 KB Created: 2021-03-29 15:35:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 824626999ac6a0902e1fdc700da2c368 SHA-1: 1702158c7310b8c405c60ce9b0f4be599e404a55 SHA-256: 371b575aa3b1d171a90a3af69c14165709c15727a8639726dc1d1a3137e0f818
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs, such as 'https://botokaw.ru/123?utm_term=evil+dead+tamil+movie++hd', are likely used to redirect users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://botokaw.ru/123?utm_term=evil+dead+tamil+movie++hd
    • https://nevutero.weebly.com/uploads/1/3/4/7/134716167/490de47.pdf
    • https://jedidaril.weebly.com/uploads/1/3/4/6/134687024/8809673.pdf
    • https://riviruzo.weebly.com/uploads/1/3/0/7/130739493/1538913.pdf
    • https://delitulasuv.weebly.com/uploads/1/3/0/7/130775658/zavilelurelapaveru.pdf
    • http://vajukadezazi.getenjoyment.net/8909034542.pdf
    • https://zinubokutedoses.weebly.com/uploads/1/3/5/9/135956806/vesuvus_purutokuf_liwavuxezunage.pdf
    • http://tuzupibu.scienceontheweb.net/selakibawiwozariduluwadit.pdf
    • https://finedogu.weebly.com/uploads/1/3/4/7/134749629/8573035.pdf
    • https://donedujawag.weebly.com/uploads/1/3/4/3/134315137/banusafi.pdf
    • https://tevaxuxelajuri.weebly.com/uploads/1/3/2/7/132712575/lasilobefuluwile.pdf
    • https://xapowukugo.weebly.com/uploads/1/3/4/7/134702937/miwudatutetidabazaze.pdf
    • https://xarupome.weebly.com/uploads/1/3/4/4/134469096/pugaduresojigem-mujazagumot.pdf
    • https://woxazalaxit.weebly.com/uploads/1/3/4/2/134235403/15c68ac3cca3a24.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/buwosevax/bupotul.pdf
    • http://pekowob.onlinewebshop.net/bojuwegot.pdf
    • https://s3.amazonaws.com/daraniwekamidir/blacklist_imei_check_report.pdf
    • https://uploads.strikinglycdn.com/files/47cef9a6-3455-4c5c-a0af-d650add9623a/volvo_penta_duo_prop_outdrive_parts_diagram.pdf
    • https://s3.amazonaws.com/padosumifubobo/11814499861.pdf
    • https://uploads.strikinglycdn.com/files/dda634c3-96eb-4e10-90be-687299b6022f/dlink_dir-605l_reset_to_default.pdf
    • https://uploads.strikinglycdn.com/files/a57923c5-f224-4070-982e-5bd543ebcf12/mi_planta_de_naranja_lima_captulo_1_resumen.pdf
    • https://s3.amazonaws.com/tojazudibumogab/84180605550.pdf
    • http://dojafeduzig.myartsonline.com/biwuxovusamitejobuzozetud.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000182c9.bin
786b94f467116931cc3dc773c6fd3a91f3fb91bc5238028a7f65a6a904d84fcc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x182C9 4808 bytes
font_01_sfnt_off00019302.bin
46083bf53a57fe462aa434051a2481fdd27dab1ed03e43819b538b1059149410		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19302 12316 bytes

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