Malicious PDF — malware analysis report

Static analysis result for SHA-256 207c155e78f52b06…

MALICIOUS

PDF

91.2 KB Created: 2021-09-14 11:03:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0c895a0a2d06129b2dc7afe27133d948 SHA-1: bde6d5fe688a65d89764cce864ad767cba3bcf5c SHA-256: 207c155e78f52b0691c647a53a7233ee2fae444c63a552bdafa7a9384a875902
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it functions as a link farm. Multiple embedded URLs point to potentially malicious domains, suggesting an attempt to redirect users to phishing or malware hosting sites. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed for initial access via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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 http://hanstime.com/userData/board/file/29668424515.pdf In PDF document text
    • http://lscapital.it/images/file/68829914391.pdfIn PDF document text
    • http://mothertheresapublicschool.com/userfiles/file/7356500789.pdfIn PDF document text
    • http://canadanur.com/resimler/files/pozagulesoji.pdfIn PDF document text
    • https://nstyapi.com/resimler/files/vigujubomiwaseloj.pdfIn PDF document text
    • https://malinaionescu.ro/userfiles/file/batagavofav.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/161349b042830b---zodudiberim.pdfIn PDF document text
    • http://jr.ac.th/ckfinder/userfiles/files/45042437990.pdfIn PDF document text
    • https://rumahbaruku.com/contents/files/9342277084.pdfIn PDF document text
    • http://www.firstpages.eu/app/webroot/files/userfiles/files/dilujatavolepo.pdfIn PDF document text
    • http://srtprogetti.eu/userfiles/files/gigadumosatoperijejozati.pdfIn PDF document text
    • https://ripedzn.com/app/webroot/files/fckeditor/file/sugizexitupobetumiludut.pdfIn PDF document text
    • http://lynxauto.ru/userfiles/file/gareteje.pdfIn PDF document text
    • https://indirimlipin.com/calisma2/files/uploads/14204541894.pdfIn PDF document text
    • https://mavibusiness.it/file/85948605819.pdfIn PDF document text
    • http://copingconversations.com/userfiles/file/lokemadebixizodaji.pdfIn PDF document text
    • http://radissonhoteltraining.com/userfiles/file/27418178208.pdfIn PDF document text
    • http://hamyarsanatco.com/ckfinder/userfiles/files/rubimixubevenanapogomela.pdfIn PDF document text
    • https://tradegateindia.com/userfiles/file/lupasesifulizapi.pdfIn PDF document text
    • http://curvesncontours.com/userfiles/file/xutevefagaz.pdfIn PDF document text
    • https://pmcp-avac.com/files/upload-ckfinder/files/71215876068.pdfIn PDF document text
    • http://yeongwonenc.com/userfiles/file/nevemufapulolesijoji.pdfIn PDF document text
    • https://ags-car.60km.com/upload/files/wopitamedojipi.pdfIn PDF document text
    • http://viethanit.vn/hinhanh/file/rupinuzesokedaje.pdfIn PDF document text
    • http://maturitni-ples.eu/UserFiles/File/xajegotejowepokuf.pdfIn PDF document text
    • https://github.com/In PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=friday+night+funkin+fps+plus+androidPDF 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_off0000f84f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84F 10928 bytes
SHA-256: 669df8101a970addffb6683d2f6374ffa2f5f2c624860b654958f215c39b986a
font_01_sfnt_off0001114c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1114C 20724 bytes
SHA-256: df1d29c39c8f3e476c9c5631ce63d222c142a7e4191eb15a8e96ed6f1075d5bc
font_02_sfnt_off0001470f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1470F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1