Malicious PDF — malware analysis report

Static analysis result for SHA-256 4be685e6e9b99636…

MALICIOUS

PDF

67.5 KB Created: 2020-11-10 23:53:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 14e1bcd09832bed9c6bbe0e10cfb8471 SHA-1: da242bf923e74986b811f83ac8d42ee353c9e788 SHA-256: 4be685e6e9b9963689d7a2d1751f1c93570115db5516d864a268b622818ef35f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://trafffi.ru/123?keyword=axis+football+league+unblocked+at+school PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377379/normal_5f8c44ca48e8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469116/normal_5fa91789c8a89.pdfIn PDF document text
    • https://komanibinepo.weebly.com/uploads/1/3/4/5/134588578/kereso.pdfIn PDF document text
    • https://xexovelez.weebly.com/uploads/1/3/0/8/130813416/36fed651.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403266/normal_5f9ad860a4427.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375071/normal_5fa04a44a2894.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366357/normal_5f90ace7bb421.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/422bb503-3283-47d3-b947-dd3ead2b3b2d/noktalama_iaretleri_ygs_km_sorular.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12feff22-cd9b-4fd0-aabc-46492781db77/72757144920.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/533ceee9-9275-4f51-9236-c9ce930c614b/resojafunebaxupigoradusav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6116180f-8a27-4f1e-a860-7c490823735f/wekijugojutanawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34275b45-e73e-4227-b331-67ca5d17d72d/54129206608.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9098101d-7dbc-44b5-8837-591310a25e13/xebej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d179a146-852f-441e-8920-7a0234f35212/58758997652.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc384a3b-7780-44ae-b88c-8a6734dd0543/46599527797.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bb28de2-0078-4284-b734-e1bc1ff623b3/pemis.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAD8 5448 bytes
SHA-256: 3e2f3834ade0ad88e65deb97e4234663e92bb54fcbd780b886c76617306a4f89
font_01_sfnt_off0000dd6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6B 10732 bytes
SHA-256: b8293570c4bbd9b5e70e2ec8153c46bf827d28f049bf8847844f13b7faa19cc9

Open this report in the interactive analyzer, or submit your own file for analysis.