Malicious PDF — malware analysis report

Static analysis result for SHA-256 e47ad21aca70d9b3…

MALICIOUS

PDF

85.9 KB Created: 2021-03-23 10:06:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a82309c7628e4994fc80a94c51c197d6 SHA-1: 9cb6a1e0f1cecf230e6afab858dcd0cdc621a3ff SHA-256: e47ad21aca70d9b35b0d549bde04b5ac72a1719c8c2d855228756e2998e1904e
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO spam campaign. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xezojetit.ru/strik?utm_term=is+comptia+itf%252B+worth+it PDF link annotation
    • https://limorevoxa.weebly.com/uploads/1/3/4/6/134611026/640185.pdfIn PDF document text
    • https://cdn.sqhk.co/guwaloxipete/AgjYib8/afnor_formation_auditeur_irca.pdfIn PDF document text
    • http://lakshmi-store.ru/godaddy._com_website_templatesi41nt.pdfIn PDF document text
    • https://lavabowigu.weebly.com/uploads/1/3/2/6/132682694/welovibovijowebonovu.pdfIn PDF document text
    • https://cdn.sqhk.co/nalomuxe/hjbZKhj/yandex_browser_mac_os_10._6.pdfIn PDF document text
    • http://submonster.xyz/lojofudetojovd4am.pdfIn PDF document text
    • http://thefortykuti.com/apps_for_getting_followers_and_likes_on_instagramd9pgy.pdfIn PDF document text
    • https://cdn.sqhk.co/kavejufa/jcQMUie/mens_save_the_planet_vans.pdfIn PDF document text
    • https://mekuzawejonoma.weebly.com/uploads/1/3/1/6/131606345/a6e3e.pdfIn PDF document text
    • https://pejexiguwela.weebly.com/uploads/1/3/1/1/131164442/4fe62d89d.pdfIn PDF document text
    • https://simepatu.weebly.com/uploads/1/3/4/2/134267103/efe17538.pdfIn PDF document text
    • https://fogofude.weebly.com/uploads/1/3/4/3/134322730/jimopoxinaguwe_kovit_tekewoxo_talebub.pdfIn PDF document text
    • http://winoorama.fun/descargar_harry_potter_y_el_nio_malogkhk.pdfIn PDF document text
    • http://ttop-shop.com/wrist_blood_pressure_monitor_manualotzch.pdfIn PDF document text
    • https://porokademapu.weebly.com/uploads/1/3/4/9/134901730/073880eaf46f2f3.pdfIn PDF document text
    • https://jafobepajimo.weebly.com/uploads/1/3/4/8/134881918/640c01.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://6d706a39-1f93-4f1a-9423-caccf7e65e71.filesusr.com/ugd/69f91f_e524d88ad7014c80b9785de7c4fb8983.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/cube_root_worksheets_8th_grade.pdfIn PDF document text
    • https://78151a86-a557-4e49-81aa-a2539eea45c7.filesusr.com/ugd/204f4f_f679b6d32be5411a9304b9e95800ecff.pdf?index=trueIn PDF document text
    • https://8eeb1f0a-0cdd-4c66-98a4-83777b49fb54.filesusr.com/ugd/64f9d2_6a3a030ff5af435e99d2286f46111eee.pdf?index=trueIn PDF document text
    • https://2a4c341d-9af7-4f89-b48a-1b926ad6ced7.filesusr.com/ugd/dd6616_c8313e49102b4be0b709b98077458bb8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tazopaju/how_to_get_job_for_fresher_engineer.pdfIn PDF document text
    • https://0d555108-1732-4721-8d72-76d747b2053a.filesusr.com/ugd/1b0481_80358c3681264b1098c0875148578bcd.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103ED 4816 bytes
SHA-256: 38e505c2612c8722e7ac5a571de78c5d895eeb67df091b9fb6e26d81f67e4744
font_01_sfnt_off00011449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11449 11804 bytes
SHA-256: 94d6f0b25525b03c26af73add0353710241588cf314a8f52c0791636fcf787f1
font_02_sfnt_off00013c35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C35 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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