Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e779796a2347eaa…

MALICIOUS

PDF

74.1 KB Created: 2021-02-21 21:37:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c6fa35591e61905625ed2f2afe90af23 SHA-1: a4a6a866963630da8a52cbc82bb9a50a4660fe13 SHA-256: 1e779796a2347eaa95b7c0030ef497baee37f30b2c6aa0339840b50401c7ce08
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of embedded URLs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, appears to contain keywords related to product listings, likely as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/strik?utm_term=weber+stainless+steel+grates+for+spirit+e-310 PDF link annotation
    • http://ifeelgood.club/associative_property_for_3rd_grade_worksheetykx3g.pdfIn PDF document text
    • http://rodupokikoxozed.22web.org/choose_the_correct_answer_in_science.pdfIn PDF document text
    • http://pocki.top/music_videos_to_my_phonewaegw.pdfIn PDF document text
    • http://golepikoxeware.22web.org/fowomelaje.pdfIn PDF document text
    • http://fuckfrsky.com/pawirimoluposojubaditap3t930.pdfIn PDF document text
    • https://cdn.sqhk.co/nifodotiriru/9abhinj/tanukuduloz.pdfIn PDF document text
    • https://bejeselujolir.weebly.com/uploads/1/3/1/3/131379719/gogirotasanopu.pdfIn PDF document text
    • http://noverst.xyz/mack_truck_repair_manual_freezehvi.pdfIn PDF document text
    • https://xedasijaw.weebly.com/uploads/1/3/1/4/131453620/213cfb6.pdfIn PDF document text
    • http://romeita.space/bebovusla123.pdfIn PDF document text
    • http://cetop.xyz/rosegivezosuvibbteq4.pdfIn PDF document text
    • http://netunesufugu.22web.org/best_performing_separately_managed_accounts.pdfIn PDF document text
    • http://nashremont.site/rust_disconnected_connection_attempt8npc3.pdfIn PDF document text
    • https://fovezifume.weebly.com/uploads/1/3/0/8/130874198/buniludi_zomukad.pdfIn PDF document text
    • http://haifaiv.ru/218930311101dh8p.pdfIn PDF document text
    • https://cdn.sqhk.co/niripakexad/jhhhshe/silver_dollar_city_christmas_lights_video.pdfIn PDF document text
    • http://uablog.website/space_engineers_won_t_download_modsiz3ex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bakilipos.epizy.com/badmash_company_songs_djmaza._com.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/boomerang_tamil_movie_free_in_tamilrockers.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/jubebiradutofud.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/archicad_19_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/address_book_software_free_full_version.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_off0000e30d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30D 5612 bytes
SHA-256: 75bc1c7be71bb5cb985f34e038b6c6b20409407add360050eca44a9c930b418e
font_01_sfnt_off0000f64f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64F 10780 bytes
SHA-256: a03c499b8b5fc1eb59f8234bcfa1a15e48cb83ac0f40b32b7f8c7d0f0e60cd24

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