Malicious PDF — malware analysis report

Static analysis result for SHA-256 58dba3051718dd97…

MALICIOUS

PDF

100.5 KB Created: 2021-04-02 12:50:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d44b1cda33edff63f1ba35ccaeda0a1d SHA-1: e407bc62afc7e395f9397a8d56d134a8de73078a SHA-256: 58dba3051718dd97495a3f496a9176757ab0e49a6fefa63d2ea8bae305bc2d59
194 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The document body, though heavily obfuscated, appears to be a lure related to a 'Beauty and the Beast panto script PDF', likely to encourage clicks on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jacksth.ru/award?keyword=beauty+and+the+beast+panto+script+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4478398/normal_5ff497ae377eb.pdfIn PDF document text
    • https://gutamigev.weebly.com/uploads/1/3/1/1/131163772/gugubu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445130/normal_6026eec5dfa64.pdfIn PDF document text
    • https://kejobogufepemis.weebly.com/uploads/1/3/0/7/130775396/gojejukovefo.pdfIn PDF document text
    • https://rikusinifo.weebly.com/uploads/1/3/4/0/134017093/dafipepo_zarix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497071/normal_5ff407c2d5803.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498997/normal_605b88c94810c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vexeliku/jasetexivele.pdfIn PDF document text
    • https://7e005a1c-fb68-43c1-af83-b854b6a2d282.filesusr.com/ugd/dcfb95_0f620cdbd8e54d269bb2e38666c95183.pdf?index=trueIn PDF document text
    • https://3ecb585b-79b8-4502-8567-d9a17299c5c1.filesusr.com/ugd/4b874d_d68a05f8050a4cf5bfc2e6671ca72354.pdf?index=trueIn PDF document text
    • https://932aa67c-856a-4fda-9fc8-fe3f50d4acc2.filesusr.com/ugd/a25eee_58f828bad61f4e27ad010948d687ae44.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/69df7d3e-3de6-4cb7-ae6a-dab78a4316bb/nuzeza.pdfIn PDF document text
    • https://e6a48395-9ebc-465e-8505-c4b20d7b8e72.filesusr.com/ugd/81e12b_f98e57f0037e4cee8adc320308a4947d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rebomedug/tavoseloterokibatipemiju.pdfIn PDF document text
    • https://931f52e6-cb68-4a93-8e02-54808d33f8b6.filesusr.com/ugd/6290de_a35b7cfb0d90408e93cb3b02ee9de4b3.pdf?index=trueIn PDF document text
    • https://810dce77-56ab-4324-823a-3549757f4eab.filesusr.com/ugd/1fad07_57b939c7782d40de8bc168c2cdf09f0e.pdf?index=trueIn PDF document text
    • https://44034db3-6cdd-4729-adf3-7ccd6afcf354.filesusr.com/ugd/9fe9cc_5000b0e3664e4e7a8b7973d016b5de6a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab8eb187-2b42-4733-9708-5b12227c8bd8/raxupukajomimibazade.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn 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_off0001349f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1349F 5504 bytes
SHA-256: 3b317a22eac4ce10decc49da6aaafaf2995d8079b7d2a8da99436f87bdc5d8a6
font_01_sfnt_off00014750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14750 11176 bytes
SHA-256: 233d902334e8872d8021dcb4e9754a8aedf2d072148fccadd24d549dea816804
font_02_sfnt_off00016d5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D5C 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501