Malicious PDF — malware analysis report

Static analysis result for SHA-256 39eee9de82dff897…

MALICIOUS

PDF

78.1 KB Created: 2021-03-28 14:25:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d48c43d2bfe892f98c7cc7f20f9f781a SHA-1: be51b060ecb0a9dd17163ae01a6b71d4d6d7ba88 SHA-256: 39eee9de82dff897430b72908c2424ac05c7f29933b325ee20e1674a06512fd4
126 Risk Score

Malware Insights

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

The PDF contains numerous links to disposable domains, with one specifically identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://unreguezff.rest/ford_mekaniske_bremsercc1c2.pdf In PDF document text
    • http://smotrikino.fun/what_does_an_evaporation_line_look_like_on_a_blue_dye_testao3pc.pdfIn PDF document text
    • https://cdn.sqhk.co/xawemubimaj/X7f5fQA/alien_shooter_game_online.pdfIn PDF document text
    • http://andyhong.blog/72850555173kq4m3.pdfIn PDF document text
    • http://nukicew.xyz/pakalunipidilupasoyirkw.pdfIn PDF document text
    • http://yoga-italy.space/vurazunofulakidoxesundm92.pdfIn PDF document text
    • http://upgrade4me.com/dont_starve_together_social_modelefyu.pdfIn PDF document text
    • https://cdn.sqhk.co/noradinez/oIqoX3L/admin_dashboard_bootstrap_4_template.pdfIn PDF document text
    • http://shishkin-seed.xyz/nobibijigamojilaeddd4.pdfIn PDF document text
    • https://cdn.sqhk.co/pawanipol/eihPm70/download_uc_web_browser_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/rizonozugaj/ijnVldx/spiralizer_reviews_canada.pdfIn PDF document text
    • http://arendagg.xyz/144282542367b3y.pdfIn PDF document text
    • http://cheeronthemove.store/how_long_does_it_take_to_fully_recover_from_scoliosis_surgery05mlm.pdfIn PDF document text
    • http://reactivascotia2020.com/45274065243onbqv.pdfIn PDF document text
    • http://santand-es.com/90s_hit_mp3_songs_download_zip_fileysvtm.pdfIn PDF document text
    • http://merogerofame.66ghz.com/past_continuous_affirmative_negative_interrogative_exercises.pdfIn PDF document text
    • http://itgermany.net/clasificacion_de_funciones_constante_ejemplosmkmuy.pdfIn PDF document text
    • http://slimitalia.space/hofmekler_warrior_dietuqujk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Infin/~3/YW2AKwb2eCA/infin?utm_term=building+skills+toefl+ibt+pdf+freePDF link annotation
    • https://849bdae7-2456-4570-9e2a-fc769e7e49ad.filesusr.com/ugd/2074c9_782f46bd537147ef8798d016deee6baa.pdf?index=trueIn PDF document text
    • http://pimibini.epizy.com/zujobiri.pdfIn PDF document text
    • http://fegifujeviba.epizy.com/1696907259.pdfIn PDF document text
    • https://20128683-61eb-4207-b985-d468b1a81fea.filesusr.com/ugd/0049ca_339a4a0a430d484a9a54cfb18e4c6ba0.pdf?index=trueIn PDF document text
    • http://lenixad.epizy.com/creature_3d_songs_mp4.pdfIn PDF document text
    • https://436240a4-ef10-404e-ad90-c5cab949c7af.filesusr.com/ugd/3fb742_aac2a0398b354412a2bd38e1a23beb46.pdf?index=trueIn PDF document text
    • https://6c036dbd-b327-4678-b778-de8a2ee7bb50.filesusr.com/ugd/ed64d2_b50dd3944db543b69b559a45aeb0b388.pdf?index=trueIn PDF document text
    • http://bikutuvuxaxixo.epizy.com/fusionner_plusieurs_fichiers_en_un.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_off0000eb25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB25 5252 bytes
SHA-256: 1d7d74af80665fe1607bb0d6c02830d097f5fae53febb2d0e2027cec9d181697
font_01_sfnt_off0000fd15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD15 14668 bytes
SHA-256: e44d68ec90857c87654af6a0894d4a1660e019626b9d43a02c00775702197396