Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbd7b864dbf73a84…

MALICIOUS

PDF

67.1 KB Created: 2020-12-22 02:16:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 37313b81ba7f1c4e8ea4d628b284917a SHA-1: 10b1803778ace00bc2285b42ba8fd68612569ca7 SHA-256: fbd7b864dbf73a8409053af0d822f4368433e9b4b4f956b898b58e12d66536c4
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://traffine.ru/123?utm_term=amargo+en+ingles+traductor PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490376/normal_5fb594778dbda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366036/normal_5f8939925bf91.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457861/normal_5fd088b67d948.pdfIn PDF document text
    • https://birijoxumel.weebly.com/uploads/1/3/4/5/134587798/nilununexafojegu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473419/normal_5fdeedb38e586.pdfIn PDF document text
    • https://vumorusumanipav.weebly.com/uploads/1/3/4/2/134234742/dfc69e74491f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369333/normal_5fb6bc85e7b08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480588/normal_5fb48b0831a51.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388620/normal_5fc3de9c7a9ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487423/normal_5fac35d39ecb6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474465/normal_5fc414edee34c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375694/normal_5fd0a9674f1f1.pdfIn PDF document text
    • https://memarexegota.weebly.com/uploads/1/3/4/3/134366516/tigosarowawoze.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/5fdeb274fbf4ee0481da8a5f/t/5fdf8a1f51a86c1b6c39e5d2/1608485408315/zomiwozejububurununov.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd37863f59a2572d8ffde5/t/5fde244af23a830a59a0f3e2/1608393804700/abs_exercise_app.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_off0000c514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC514 5248 bytes
SHA-256: 59321139bd6f50c4ee0a38d7da4f6c4ee2143a86669ec4d1f4043c3ac6344531
font_01_sfnt_off0000d6d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D0 11972 bytes
SHA-256: 92cd1765154c224d790e4ccafe0509b0262e3f9f758b10468f9c2c509abcedf2

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