Malicious PDF — malware analysis report

Static analysis result for SHA-256 6894a0ec2c133e6e…

MALICIOUS

PDF

85.7 KB Created: 2021-03-13 22:27:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: db31b48262c3ea943f00617e85e63ed5 SHA-1: fbcc1a8403d11eb6f00d76699283f8aff428d899 SHA-256: 6894a0ec2c133e6eca5510128c6c84f98981abbbbcdb73f42ec1ef86fc96fe66
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable or suspicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8150

Heuristics 4

  • 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
  • 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://zajinet.ru/award?keyword=meaning+of+career+development+pdf PDF link annotation
    • http://thepropheticapp.com/where_can_i_travel_abroad_without_a_covid_test8x0bb.pdfIn PDF document text
    • http://copyrighthelpptteam.com/best_big_green_egg_prime_rib_recipeg96hw.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxubefe/ghUjggi/csgo_ak_neon_rider_trade_up.pdfIn PDF document text
    • http://procripton.com/best_time_to_catch_squid_perth6h5o0.pdfIn PDF document text
    • http://kuzuwagakemesux.iblogger.org/92644170318.pdfIn PDF document text
    • https://cdn.sqhk.co/tewisifupib/eMFhi9P/zte_axon_7_android_pie.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_275b72a69af04803b032e56441e54f23.pdf?index=trueIn PDF document text
    • https://170d08c7-2527-4f8e-8bc4-cf7f6ffab704.filesusr.com/ugd/afe24e_3279c89860c54a5fb101bf10bbcdc142.pdf?index=trueIn PDF document text
    • http://ruxiwegomepolu.epizy.com/gewalug.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/invisible_inc_upgrade_guide.pdfIn PDF document text
    • http://vabizofolimise.epizy.com/92771812333.pdfIn PDF document text
    • http://jexiwowope.rf.gd/chick_fil_a_jobs_for_14_year_olds_near_me.pdfIn PDF document text
    • http://wuzuzifo.epizy.com/azle_isd_athletic_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/chrome_for_android_4._4.pdfIn PDF document text
    • http://pajisusag.epizy.com/is_dyson_the_best_vacuum_for_pet_hair.pdfIn PDF document text
    • http://sikofus.epizy.com/addition_of_integers_examples_with_answers.pdfIn PDF document text
    • https://933527c5-e005-4225-a3aa-05fee46c7696.filesusr.com/ugd/b51dd5_695a0535a3ba45b8a5b5c3d082356b2e.pdf?index=trueIn PDF document text
    • https://46ebecaa-9490-439b-bba6-ee77f1a6ca93.filesusr.com/ugd/cee8a1_965d211ff82e48718dc198ad6aa270a0.pdf?index=trueIn PDF document text
    • http://ninivekav.rf.gd/tinemevexixobidezalosevi.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/admin_panel_free_bootstrap_template.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5E 5364 bytes
SHA-256: 74e6685bd4ef08a9f18cee43c68debac68811d0a878b8844304da7e1ae5af46c
font_01_sfnt_off00011f9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F9E 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off00012b01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B01 11052 bytes
SHA-256: a47a6df304a42def555c14a664ed1358d20d01baf1b9de07839cee7436cda370

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