Malicious PDF — malware analysis report

Static analysis result for SHA-256 60d78431131efabf…

MALICIOUS

PDF

75.3 KB Created: 2021-02-21 17:52:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 19f8005384d23613226581fb2cb4331c SHA-1: 05b1624829ac4997ce7ae996a2d15410e26523bb SHA-256: 60d78431131efabf058c4c5cdf305135b305e90883264479f151b22e0881e52b
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and heuristics indicate it is a link farm on disposable hosting, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. The document body, though heavily obfuscated, appears to be a search result lure, directing users to a URL that likely hosts a malicious payload or phishing page.

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 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=what%20is%20the%20minimum%20lighting%20required%20by%20osha PDF link annotation
    • https://cdn.sqhk.co/disanefamu/Thi8Ihj/62015169616.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413458/normal_603239cb8e976.pdfIn PDF document text
    • http://trikolor.site/63529193154lyj44.pdfIn PDF document text
    • https://cdn.sqhk.co/zetoreli/fhevQ1z/84390019208.pdfIn PDF document text
    • http://socialwave.me/estrutura_do_codigo_de_barras_ean_8xgwa1.pdfIn PDF document text
    • http://zepiteravan.22web.org/47954092942.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479235/normal_5fdcb7e10fd14.pdfIn PDF document text
    • https://cdn.sqhk.co/zuvibabezel/afAgjG6/dungeon_village_jobs.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/hcjbJjg/bajugomowixetawunoj.pdfIn PDF document text
    • http://sodaapp.pro/nimokobunoqa73c.pdfIn PDF document text
    • http://crispyset.online/nattamai_movie_in_hd44hiq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/luvosoruwinelubezax.pdfIn PDF document text
    • http://nenutufap.epizy.com/state_tax_withholding_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/windows_system_administrator_interview_questions.pdfIn PDF document text
    • http://moferamobonar.epizy.com/internet_safety_worksheet_for_middle_school.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/anne_of_green_gables_summary.pdfIn PDF document text
    • http://paritoxo.rf.gd/zimap.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_off0000e83e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE83E 5620 bytes
SHA-256: d10bb89256841dc754cecb35b4b08e78837af737b5d4fc8c0979f92f0101a83a
font_01_sfnt_off0000fb2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2D 10936 bytes
SHA-256: 4f29ec6017b6998b311b747604964a55ed8d64f8e4f41ebf8d22a6b32aa9b75f

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