Malicious PDF — malware analysis report

Static analysis result for SHA-256 48d5a7fc327341f1…

MALICIOUS

PDF

74.4 KB Created: 2021-02-15 10:49:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 8ab490bebd2567bcdffa13849597f20e SHA-1: dd4c0f56b37be94be0f8e1d890591279a2998eab SHA-256: 48d5a7fc327341f1060a3bc363a2f7fc3861fb80889d7b0e44b1a6e854ab9535
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many hosted on disposable domains, and one specifically linked to a lure about starting a slot machine business. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to malicious sites.

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://seumenha.ru/strik?utm_term=how+to+start+a+slot+machine+business PDF link annotation
    • http://godubumoze.iblogger.org/logical_reasoning_lsat_practice_questions.pdfIn PDF document text
    • http://xokubenafap.66ghz.com/98965267462.pdfIn PDF document text
    • http://pogofefopi.22web.org/big_data_analytics_darshan.pdfIn PDF document text
    • http://formulamoney.top/cantaloupe_island_piano_sheet_musicfigsb.pdfIn PDF document text
    • https://gekaketiba.weebly.com/uploads/1/3/1/4/131455198/nedamobotiba_fejogajewigepa_zosuwalepifumi.pdfIn PDF document text
    • https://rakevuxex.weebly.com/uploads/1/3/4/0/134040666/fb2767f311aaf.pdfIn PDF document text
    • https://ramakizuwag.weebly.com/uploads/1/3/4/3/134321509/08042e60.pdfIn PDF document text
    • https://nutolifawivu.weebly.com/uploads/1/3/1/4/131437776/7747427.pdfIn PDF document text
    • http://return-0.com/gidodenutodumhtv.pdfIn PDF document text
    • https://cdn.sqhk.co/fenazijeguk/LbicHhd/lego_movie_videogame_cheat_codes_xbox_360.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
    • http://toxerisana.epizy.com/embedded_clause_worksheet_ks2.pdfIn PDF document text
    • http://sinamalamukin.epizy.com/angular_6_form_validation_sample.pdfIn PDF document text
    • http://midabufab.rf.gd/action_new_movies_2018_free.pdfIn PDF document text
    • http://wogafut.rf.gd/lozawedogufis.pdfIn PDF document text
    • http://niworojuxine.rf.gd/bablet_cartoon_video.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE4 5116 bytes
SHA-256: 84c5b17664e14fc1aaffb6cae070cb32dd981c4d9a2596222d971a656bc630c2
font_01_sfnt_off0000ec24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC24 9924 bytes
SHA-256: 9ed87cb613d19d51f84a40548194ea28a4367b6f6dce42413d9c01bfcd784a90
font_02_sfnt_off00010e16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E16 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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