Malicious PDF — malware analysis report

Static analysis result for SHA-256 907367eea8d2eb5f…

MALICIOUS

PDF

82.2 KB Created: 2021-04-03 11:06:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1db70b78f6b1dada00ea9d2ea84c9a7e SHA-1: 1b2b7a912cae4aed7e8e5ee0bf74b983335928f0 SHA-256: 907367eea8d2eb5fbf092b68cd4fdf41bf129ee8dd72f883ff114f98cdee1bf5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ponafet.ru/strik?utm_term=3d+animation+apps+for+pc+free+download PDF link annotation
    • http://wuwubaga.22web.org/mcdonalds_online_questionnaire_answers.pdfIn PDF document text
    • http://smartradiobf.ru/t-_shirt_design_templates_for_salemvmrc.pdfIn PDF document text
    • http://naturka.space/short_notes_on_shooting_an_elephant16790.pdfIn PDF document text
    • http://small-italy.space/beethoven_virus_guitar_tab20fpd.pdfIn PDF document text
    • http://sportplays.ru/91148620640hifjp.pdfIn PDF document text
    • http://dusosax.66ghz.com/accp_guidelines_pulmonary_embolism.pdfIn PDF document text
    • http://dutov.org/21872339741zm2d1.pdfIn PDF document text
    • http://clubstore.info/camanche_fishing_report9j8ea.pdfIn PDF document text
    • http://funseeds.site/miller_bobcat_225_specsxt9nv.pdfIn PDF document text
    • http://avtoshkola-region26.ru/theory_of_justice_brief_summary_by_chapter89p3t.pdfIn PDF document text
    • http://rezotu.xyz/pioneer_fh-x700bt_bluetooth_not_pairing4g6lv.pdfIn PDF document text
    • http://dmdmassage.com/widajoym25z.pdfIn PDF document text
    • http://okstore.info/adolescent_depression_screening_tooltz9ny.pdfIn PDF document text
    • http://roflan.site/vupuzepizawazurugbiux.pdfIn PDF document text
    • http://bluebadgeapproval.com/select_find_text_word_vbajpa1v.pdfIn PDF document text
    • http://wwbook.org/mackie_1604_manualysndy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jipakevinofulom.epizy.com/how_to_stretch_piriformis.pdfIn PDF document text
    • http://bofidimasep.rf.gd/fevijumatalifodebizevarej.pdfIn PDF document text
    • http://lapetagalelan.myartsonline.com/gevenidajepi.pdfIn PDF document text
    • http://jekuranabuvi.epizy.com/titulos_y_operaciones_de_credito_conclusion.pdfIn PDF document text
    • http://fedisumudajitu.rf.gd/79475532645.pdfIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/job_application_letter_format_in_word.pdfIn PDF document text
    • http://gopivikanofo.rf.gd/alouatta_palliata.pdfIn PDF document text
    • http://welegovejebiwun.epizy.com/narrative_in_the_life_of_frederick_douglass_quotes.pdfIn PDF document text
    • http://zedowep.atwebpages.com/kalender_2020_baden_wrttemberg_feiertage.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_off00010465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10465 5464 bytes
SHA-256: df282c1b7122b2a265f138226b548aa3fa8f16e9ae5944288cb4dbc17cd25571
font_01_sfnt_off000116f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116F6 10676 bytes
SHA-256: 6c55e696fb4d9d5f894a063a0843b8ea6a4d859714a6df94d510048ed49f3c8f

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