Malicious PDF — malware analysis report

Static analysis result for SHA-256 f203a62274257c91…

MALICIOUS

PDF

76.1 KB Created: 2021-02-12 12:07:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d06a330f498039a355c1e45a24a10781 SHA-1: 6edc5777d958db2a73b912155ec6cef428a3888a SHA-256: f203a62274257c910207e8ef12f33035f83d7846611a99be20f6a13533139a71
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable domains and acting as a link farm, suggesting an attempt to redirect users to malicious content or phishing sites. The presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly support this attack pattern.

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://baarspo.ru/wix?keyword=poisonous+snakes+oklahoma+city PDF link annotation
    • https://cdn.sqhk.co/watagovu/cJTD6gh/six_guns_gang_showdown_mod_apk_data_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nitunoda/Eb9ggic/39176109520.pdfIn PDF document text
    • https://cdn.sqhk.co/pezolaje/fljagjb/neon_city_riders_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467601/normal_5ffb314440b7c.pdfIn PDF document text
    • https://cdn.sqhk.co/vetedaxuzele/bBk8gfh/carpet_steam_cleaner_for_sale_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/wimedizi/eSbjejj/30488345822.pdfIn PDF document text
    • http://xoridamewok.iblogger.org/coringa_e_arlequina_hq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385853/normal_60110c9a54d24.pdfIn PDF document text
    • http://autobaff.xyz/happy_oasis_semaphore7flcg.pdfIn PDF document text
    • https://cdn.sqhk.co/lozuzupadis/YhcjEhh/the_big_easy_alias_crossword.pdfIn PDF document text
    • http://cleaner-inn.club/download_camtasia_studio_7_for_windowsnppc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469638/normal_5fea2165b7c7e.pdfIn PDF document text
    • http://tuwuviji.iblogger.org/88625543852.pdfIn PDF document text
    • http://puwobero.22web.org/99411248490.pdfIn PDF document text
    • https://cdn.sqhk.co/kepigofunet/cKG0hid/kill_shot_vince_flynn_movie.pdfIn PDF document text
    • http://my-favshopg.online/gawazejudulisojitosinewoldhro.pdfIn PDF document text
    • https://cdn.sqhk.co/kupejabel/ibMjgfS/glow_tic_tac_toe_bluetooth_android_source_code.pdfIn PDF document text
    • https://cdn.sqhk.co/lanuniwa/TgGbhig/birunelikojapimasadizuvez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493600/normal_60142d9812654.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://budavazej.epizy.com/cisco_finesse_12_user_guide.pdfIn PDF document text
    • http://runodeb.rf.gd/aprendizajes_clave_quinto_grado_de_primaria.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_off0000e4dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DC 5112 bytes
SHA-256: b8417cd5348e91f64c7309bdf4adb2a1d6915c6cec0dcbca0e98eef63b092ad4
font_01_sfnt_off0000f628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF628 14172 bytes
SHA-256: 44e8beb9c4011b9225be4e8212a8fa44d2c1207a92e3278c252cfe02ca4bc73b

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