Malicious PDF — malware analysis report

Static analysis result for SHA-256 263e63c8444f2e2a…

MALICIOUS

PDF

68.3 KB Created: 2020-12-08 03:02:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d410bf11e71d1f410cc81c9d88ed6b1f SHA-1: ee980b6bd3259fa416ebca60335353b1f01bbcbc SHA-256: 263e63c8444f2e2a784aab2150fcb009e4ae4c480d010f055c6c69db99f98ee4
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains numerous external links, including one to 'traffset.ru', suggesting a phishing or link-farming attempt. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf' and a date, indicating it was likely generated programmatically to appear as a search result or informational page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffset.ru/123?utm_term=lego+simpsons+house+price PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380230/normal_5fa86f2e7dfc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501777/normal_5fb9b348de99a.pdfIn PDF document text
    • https://kedifekutijita.weebly.com/uploads/1/3/4/7/134713117/vovumuruwakumulu.pdfIn PDF document text
    • https://wigotimobegevuj.weebly.com/uploads/1/3/4/3/134312632/rusilirof-dakimapemozi.pdfIn PDF document text
    • https://filewefoxu.weebly.com/uploads/1/3/4/7/134750201/jiramexufuj_xumodu_pevuri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387412/normal_5f990e53ae0ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389830/normal_5f9201028d7fc.pdfIn PDF document text
    • https://nulixedupalaz.weebly.com/uploads/1/3/0/7/130739510/pijukawadotegulereda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478946/normal_5faea1ea147e9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0f33f2cf09257bd6c4f7e/t/5fc270061972c46e3cecf25a/1606578183241/tunipo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5313f104edf1d779d1ce4/t/5fceb5b9eb7447177aac4f01/1607382457863/spike_jones_city_slickers_youtube.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc370cbcd1e280355e45738/t/5fc598b7145a8629dc71d52b/1606785208974/tepir.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc07dde27a199023ab34438/t/5fc280cc9b1ed035382d533a/1606582477242/i_am_human_and_i_think_nothing_human_is_alien_to_me_meaning.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf2c1fa04221c71e5f345/1606283970129/48753196510.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE22 5044 bytes
SHA-256: d0269081208bcd057f3f32ddfbf83500db40b53f6968b5125c54b913bef10811
font_01_sfnt_off0000df32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF32 10792 bytes
SHA-256: d3be388ec13805a8c16cd2f8aa85a5cdfc664113418c7e1957466bedf8bbb854

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