Malicious PDF — malware analysis report

Static analysis result for SHA-256 42d476d27ebb6d84…

MALICIOUS

PDF

79.2 KB Created: 2021-03-01 20:31:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 3c1c61b0f52e40df89ccd6de474ae8d0 SHA-1: 096263d82c844fc9c22f4ca63d2b6d7bb0eb7723 SHA-256: 42d476d27ebb6d84d8b2c9cd1d9ff10c4e20554532d82d546db5c4f573432fd1
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 0.9998

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://pelibifir.ru/123?utm_term=the+true+story+of+the+3+little+pigs+worksheets PDF link annotation
    • http://soxabezavusuxud.22web.org/beamng_drive_game_mod_apk.pdfIn PDF document text
    • http://servempieza.site/vakimolemugakezgf3ny.pdfIn PDF document text
    • http://basvuruizleme.online/mekegopiwamoxemepawoxnek5b.pdfIn PDF document text
    • https://mosuvixixe.weebly.com/uploads/1/3/0/9/130969854/cd1e1.pdfIn PDF document text
    • http://shoop-fg.ru/equilibrium_crash_course_chemistry_28_answers9tw1w.pdfIn PDF document text
    • http://reduslim-eu.site/giworexajamolemutnnrm.pdfIn PDF document text
    • http://jipuvojenibomig.22web.org/ruvojudanotonuku.pdfIn PDF document text
    • https://lepatoketi.weebly.com/uploads/1/3/4/7/134732542/1a23f52af1.pdfIn PDF document text
    • https://cdn.sqhk.co/lusikagidet/sjfhhjh/dujidatukupi.pdfIn PDF document text
    • https://neluposu.weebly.com/uploads/1/3/4/3/134369170/rejamemugokapanunu.pdfIn PDF document text
    • http://gemajesubon.22web.org/bollywood_dance_songs_mashup.pdfIn PDF document text
    • https://savibivo.weebly.com/uploads/1/3/1/3/131381036/vedikokidaxem_gosetexel_lomudo.pdfIn PDF document text
    • http://copyrightshelpcenter.com/fajusexxt3c.pdfIn PDF document text
    • https://detopeda.weebly.com/uploads/1/3/4/3/134305225/d4458996a46.pdfIn PDF document text
    • http://ragukonoroso.iblogger.org/ansys_cfx-_solver_modeling_guide.pdfIn PDF document text
    • http://mevukavotidu.getenjoyment.net/which_hand_to_wear_bracelet_for_good_luck.pdfIn PDF document text
    • https://cdn.sqhk.co/nimotixalulo/e9Kjfgf/download_super_pixel_heroes_2019_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jasunusemoki.onlinewebshop.net/how_to_identify_present_past_and_future_tense.pdfIn PDF document text
    • http://nijopupeboxisa.epizy.com/assigning_oxidation_numbers_worksheet.pdfIn PDF document text
    • http://zowetoxugikar.epizy.com/39862984481.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_off0000f0e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E4 5324 bytes
SHA-256: 4e97e1e4167bd938b1d8410a4849bf81be8312f06e555f2f2b3e434076a02ff6
font_01_sfnt_off00010316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10316 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off00010ba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA4 10380 bytes
SHA-256: dc4fd993e99b0e54d614d53e8ba1f0bf2f28cb96a47901b69952d0dcd6870244

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