Malicious PDF — malware analysis report

Static analysis result for SHA-256 058f9919c69e6353…

MALICIOUS

PDF

74.7 KB Created: 2021-02-21 20:45:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a7c8bedf9f0163bb4a5b0f1f07474bf3 SHA-1: a29d5a154ed5ce1935e8a350a3f2fd38d05cbbd4 SHA-256: 058f9919c69e635393e68de2dd90d56fa634e4074578ea41f4e98a4b6d149118
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting it functions as a link farm to distribute malicious content or phish for information. The presence of external URIs and the 'link farm' heuristic strongly support a phishing or malware distribution attack pattern.

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://maypoin.ru/wb?keyword=does%20td%20ameritrade%20let%20you%20day%20trade PDF link annotation
    • http://migunovaj.iblogger.org/how_to_set_up_groupme_on_android.pdfIn PDF document text
    • http://wacc-cat.org/biologiste_mdical_formationmaxbe.pdfIn PDF document text
    • http://ig-copyrightnoticehelp.com/abbacchio_joins_the_kicking_meme_templatepzhag.pdfIn PDF document text
    • http://islemleriniz.org/momentum_and_impulse_worksheet_answer_keyye773.pdfIn PDF document text
    • http://activa-fb.com/australian_bed_sheet_sizes4qo9n.pdfIn PDF document text
    • http://zipujesilan.22web.org/26611619198.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471706/normal_601c5f9a23a86.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451045/normal_5fc7e02e39de0.pdfIn PDF document text
    • http://sellamorem.com/gikefosabunerigamifimok2q2t.pdfIn PDF document text
    • http://lnstagramservicecopyrights.com/weekend_at_bernies_cast_salarylvnsf.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/jexijer/damru_bhojpuri_movie_song.pdfIn PDF document text
    • http://duvufewitopemaw.rf.gd/57291307177.pdfIn PDF document text
    • http://rupiroliwon.epizy.com/american_truck_simulator_mods_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/mozowiwew.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/basic_civil_engineering_books_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/mantua_premium_platform_bed_base_twin.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_off0000e6be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BE 5072 bytes
SHA-256: 43ca765c5ea103e00e5da7a17738a6195c39f21189f272ae0e13588d8a58279f
font_01_sfnt_off0000f7f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F2 11156 bytes
SHA-256: f71b802de186cca0a638a4d97833ded6e453226b3a88af427b6c867c5516014a

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