Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0ec61d3fd17fca7…

MALICIOUS

PDF

75.6 KB Created: 2021-09-17 23:04:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 014ce051c377bcd5344c274c9b4df567 SHA-1: 9cd5a6accc703e9c11f5f90a71bc7ce2b7107f79 SHA-256: d0ec61d3fd17fca79728f76e985ea2c409d0b897d11cdd80ae8832453dcb527d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it functions as a link farm directing users to numerous external PDF files. The presence of many distinct, potentially disposable domains suggests an attempt to obscure the ultimate destination or evade detection. While no scripts were explicitly extracted, the nature of the link farm and the ML detection point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://handgun.ee/media/file/dijatamotutufo.pdf In PDF document text
    • http://ukrfirework.com/images/file/gudomakaxovasokis.pdfIn PDF document text
    • http://arisutour.com/ckupload/files/84943219836.pdfIn PDF document text
    • http://wenyanchem.com/upload/files/xotonerumekodo.pdfIn PDF document text
    • http://pazarziraat.com/userfiles/file/68974693938.pdfIn PDF document text
    • https://poganyvolgyi.hu/userfiles/file/10246619818.pdfIn PDF document text
    • http://www.museopizarra.com/ckfinder/userfiles/files/74106271164.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/20219151617261991.pdfIn PDF document text
    • https://jagamimpi.net/contents/files/zitirizavibi.pdfIn PDF document text
    • http://improntediteatro.it/userfiles/files/tixito.pdfIn PDF document text
    • http://vpsystem.com/files/fck/67635090352.pdfIn PDF document text
    • https://projekt-lesen.de/userfiles/file/64282472267.pdfIn PDF document text
    • https://msiutilities.net/documents/49949120214.pdfIn PDF document text
    • http://solarissoft.com/img/userfiles/files/14593563819.pdfIn PDF document text
    • https://virtrade.gr/userfiles_lybo/file/1024474890.pdfIn PDF document text
    • https://butzbacher.turnpoint.jo/app/webroot/upload/files/19171019870.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/45a220ecbf9c0ea68ffd845069a53411/98475958997.pdfIn PDF document text
    • http://honda-vo.com/upload/file/rupenapogodekidewebirev.pdfIn PDF document text
    • http://salocchi.it/userfiles/files/59530128723.pdfIn PDF document text
    • http://deurenhanger.nl/userfiles/file/wobudezos.pdfIn PDF document text
    • http://kiko168.com/UploadFile/file/20210917105806314.pdfIn PDF document text
    • http://agro-partner.com/Image/files/77994251681.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/052342252088.pdfIn PDF document text
    • https://hijaustabilo.com/contents/files/tukunurazuvavipop.pdfIn PDF document text
    • http://parfumerieindex.nl/images/uploads/lumurozedefipeganovoba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=kung+fu+panda+3+full+movie+hdPDF 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_off0000c06a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC06A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD881 10908 bytes
SHA-256: 28a99a61e1e784f48759426cdc8ea2147c53ce203bb8ebabb84b1e0225d5eed7
font_02_sfnt_off0000f155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF155 17840 bytes
SHA-256: 6e3d4be7968adea4ead7e09b45f4165972d8aa15c41bc852d346b39e386c5e3a