Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7f4e5d35c09a8dc…

MALICIOUS

PDF

60.1 KB Created: 2021-01-19 11:01:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2d10371a2d72f8767c3b2276b3f46d74 SHA-1: 56e0f70ad83d3a1e746ffb75e743ccc88eaa3ed4 SHA-256: f7f4e5d35c09a8dcd33e79b65052ca4817400b808e7959fbfd2438c04c02bcd6
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, indicating a link farm designed to manipulate search engine results or direct users to potentially malicious sites. The presence of embedded URLs and the nature of the link farm suggest a phishing or SEO scam campaign.

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.
  • 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.
  • 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://leonvi.ru/wb?keyword=flip%20flops%20mens%20olukai PDF link annotation
    • https://cdn.sqhk.co/wixexozesila/6pgsXCT/cake_decorating_day_courses_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/wemonamo/beRhaIA/bee_backpack_for_dogs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459320/normal_5fca4a92bd806.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496146/normal_5fe5c58e74820.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/gyZtG6v/mobomos.pdfIn PDF document text
    • https://cdn.sqhk.co/jetirivotu/eJVhhVB/download_pixelmon_mod_for_minecraft_1._14_4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468551/normal_5fe6ee8b3164b.pdfIn PDF document text
    • http://wubegewefek.iblogger.org/37537992462.pdfIn PDF document text
    • http://nobirejajatit.iblogger.org/mcdonalds_apple_pie_box_template.pdfIn PDF document text
    • https://cdn.sqhk.co/sisadenev/qiazjdu/carson_wentz_free_agent.pdfIn PDF document text
    • https://kazowutulegopos.weebly.com/uploads/1/3/5/3/135324393/6e474fbd563c6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nazifaba.rf.gd/pojumepepiforaxajilomikud.pdfIn PDF document text
    • http://gomitobovuni.rf.gd/time_connectives_worksheet_for_grade_4.pdfIn PDF document text
    • http://kejarajavamoge.epizy.com/20431822941.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_off0000afde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFDE 4968 bytes
SHA-256: 551b4ba9e444b25f3dca91f28d92e29eb3b7b12ced543c105064b44350c59ce4
font_01_sfnt_off0000c0be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0BE 10300 bytes
SHA-256: 74e0c2c9f38a27cee383c25dc9ce8a5e74ee2a0e879a39ce9e632214cffdb475

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