Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ad45334a28d6e12…

MALICIOUS

PDF

74.3 KB Created: 2020-11-16 18:12:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 465865e4a47c410e04bbb776a6bde214 SHA-1: dd3ab2647d00a2bb9d5c906efbad341b1ed76d46 SHA-256: 2ad45334a28d6e12e6100169caae44b93f2b55304a00234ce4bea3861e67bdb5
164 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://traffine.ru/123?utm_term=legend+of+krystal+rebirth PDF link annotation
    • https://dodivimibo.weebly.com/uploads/1/3/4/3/134305777/lixisikikaporamote.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375077/normal_5f8be17c76f62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464529/normal_5fa43f5cb2a92.pdfIn PDF document text
    • https://pevinuwipe.weebly.com/uploads/1/3/0/8/130873962/3740324.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369520/normal_5f8b463eb3522.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454670/normal_5fa14d275f64b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379731/normal_5fae03e411caf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/66462657-e23c-4f08-bf22-97362d5fb6e4/hyper_light_drifter_controller_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/microsoft_access_2010_tutorial_indonesia.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/female_gnome_d_d.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36f34fa2-819e-4777-9e6e-4615544a083c/damosemepiv.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/lake_county_ohio_ccw_office.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/edexcel_ial_chemistry_data_booklet.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/geisha_house_madison_wisconsin_reviews.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE42 5204 bytes
SHA-256: f1781b08576d1cf6ab9d544d902d0ebf199a715de35a5f1fac227fac0d0f3c66
font_01_sfnt_off0000dff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF3 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000e880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE880 11112 bytes
SHA-256: 69fe718d66c3d57ea1a72c0cad5b0a1ede09447cc615e1ce3364b9e94470e854
font_03_sfnt_off00010e3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E3E 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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