Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dca6e139a78d227…

MALICIOUS

PDF

78.1 KB Created: 2021-02-17 19:42:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 54a9804aba9a0a81517d20f204eac0c9 SHA-1: 60e6c24aa54a27936764ada5dbc43cf675ad952e SHA-256: 7dca6e139a78d227c01f229ea2c78bd88883db35248198663ed6f815bce80131
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to known malicious redirector infrastructure and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution via these links. No scripts were extracted, but the PDF structure itself is weaponized to redirect users.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=itf+wheelchair+tennis+classification+rules In PDF document text
    • http://floradoma.net/escape_room_level_51_to_100_answerzhyl6.pdfIn PDF document text
    • http://larts.digital/vertigo_movie_in_tamilmrz1l.pdfIn PDF document text
    • http://electrumwallet.buzz/76428485351oi5fo.pdfIn PDF document text
    • http://magnitoli-2ekran.site/encadrer__la_dizaine_prs_ce2sgoie.pdfIn PDF document text
    • http://sk-anker.ru/tectonic_geomorphology6pi5y.pdfIn PDF document text
    • http://donbetosstreettacos.com/pvcb6b9a.pdfIn PDF document text
    • http://mandarins.space/dirutupel2ihuk.pdfIn PDF document text
    • http://b0xberry.online/mcdonalds_breakfast_start_hours_ukv7ntp.pdfIn PDF document text
    • http://montana-media.com/frequency_table_gcse_answers0jgv0.pdfIn PDF document text
    • http://good-production9.site/hero_hunters_best_heroeso73o3.pdfIn PDF document text
    • http://mesretly.xyz/75827620611ugcs1.pdfIn PDF document text
    • http://1xbets-regs.site/40358421689he5wr.pdfIn PDF document text
    • http://creampiepow.club/comptine_dun_autre_t_laprs_midi_free_downloadpuzzr.pdfIn PDF document text
    • http://xtw2.club/80222564251f7082.pdfIn PDF document text
    • http://copyrightnotices-form.com/anselm_proslogionjvxzb.pdfIn PDF document text
    • http://musofiron.ru/gelesefosefafenudukojtpbtx.pdfIn PDF document text
    • https://cdn.sqhk.co/konafomaz/ieaijFG/pivur.pdfIn PDF document text
    • https://cdn.sqhk.co/jezuleku/4jglBKF/12255316903.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vefelazubogimew.rf.gd/69264025077.pdfIn PDF document text
    • http://wereguvepowu.epizy.com/ceramics_engineering_materials.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD49 5000 bytes
SHA-256: 5c01dcf0b6b6074980c6205b84f98c374680772f4cc34e63c6cf72b7fafb3c10
font_01_sfnt_off0000ee5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5A 10828 bytes
SHA-256: db208c91bc715e0ebd58eb530a341a852ede90ae2398754ca30bbec933cabd7f
font_02_sfnt_off00011228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11228 17032 bytes
SHA-256: 377374bb69acadd334a316b036f30fcc69bbdb9712888dae63886d3dc6bdff02

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