Malicious PDF — malware analysis report

Static analysis result for SHA-256 c10919f0d3dbdb5d…

MALICIOUS

PDF

77.8 KB Created: 2021-03-07 19:36:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 774e3474523e4e9cd1510e796377bf0a SHA-1: 6d70d9320b2188bb8ea2ae064bf816f0f8a4c85c SHA-256: c10919f0d3dbdb5de7d4e591d280e9f03d8b183ddf47cf4e23d295d4ea4bc627
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document body, though heavily obfuscated, contains text related to song lyrics, which is likely a lure to disguise the embedded URLs. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates the document is a link farm on disposable hosting, pointing to a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/award?keyword=a+few+of+my+favorite+things+sound+of+music+lyrics PDF link annotation
    • http://xelasurugopu.mywebcommunity.org/tezobebipafifawedetise.pdfIn PDF document text
    • https://ramakizuwag.weebly.com/uploads/1/3/4/3/134321509/savavinujabez-gitirigufilaf.pdfIn PDF document text
    • http://naliputa.mywebcommunity.org/how_to_use_a_cen-tech_digital_multimeter.pdfIn PDF document text
    • http://discount50it.pro/psicologia_educativa_ausubelz9qjb.pdfIn PDF document text
    • http://differencecheats.net/printable_crossword_puzzles_with_answersgx3ug.pdfIn PDF document text
    • http://medebupima.sportsontheweb.net/60163889705.pdfIn PDF document text
    • http://likefetevu.getenjoyment.net/wasimebirof.pdfIn PDF document text
    • http://rankingcoach-seo.com/37889772082tf5v1.pdfIn PDF document text
    • http://xugaguf.mypressonline.com/what_are_the_5_ps_of_planning.pdfIn PDF document text
    • http://fezufizibum.mypressonline.com/how_to_check_hidden_pictures_on_facebook.pdfIn PDF document text
    • http://tesar-krd.ru/quadratic_equation_worksheet_grade_97id54.pdfIn PDF document text
    • http://hdsamara.ru/dedozufewubaremobiwapeh09ll.pdfIn PDF document text
    • https://wijekuwonud.weebly.com/uploads/1/3/4/6/134645716/a277cce52843f7.pdfIn PDF document text
    • http://romeital.space/how_big_do_childrens_pythons_growr3ks9.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/jivuxo/62032413009.pdfIn PDF document text
    • http://vajapojaperusu.myartsonline.com/what_is_burger_sauce_made_of_uk.pdfIn PDF document text
    • http://vobikeretuwof.atwebpages.com/judakelunulugimovesumin.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/92015263714.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/confessions_of_a_shopaholic_movie_watch_online.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/interim_audit_report_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/guxarupadabiwugukekikupuk.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_off0000e59b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE59B 5676 bytes
SHA-256: 35b248155e27f3d9206ff425ae86144f4d3def78148aa5fdba576922770283d2
font_01_sfnt_off0000f8e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E1 15696 bytes
SHA-256: 1d6d3dc65e5f40e7574c0162ad1a7044e201c73187ba9b8432ac689c098888cd

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