Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb687016f22639c0…

MALICIOUS

PDF

74.0 KB Created: 2021-03-05 23:40:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2315285674e672a6086bc14baa1be869 SHA-1: 70609cefb88f35cd62a8897741085de3f5d4d0aa SHA-256: eb687016f22639c02be7f51ccf6e55f3110c18dd0b0b89095137c9ce9e7b2d87
126 Risk Score

Malware Insights

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

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

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://botokaw.ru/wix?keyword=codingbat+array+2+answers PDF link annotation
    • http://creditreportfast.info/wunetepozikupomepokusudomcen4o.pdfIn PDF document text
    • https://cdn.sqhk.co/difixoruze/hemhggh/bedroom_furniture_sets_california_king.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385887/normal_6003d45d60605.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/htbhdwz/86904839247.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492588/normal_6007ecdedb9a8.pdfIn PDF document text
    • http://sesugato.iblogger.org/blockers_x_premium_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/milatepoz/AeNBQhb/lebogefopugenifinus.pdfIn PDF document text
    • http://rusherx.studio/windows_10_lock_screen_timeout_disable4mi9i.pdfIn PDF document text
    • https://cdn.sqhk.co/pabelewexo/afthejr/gutscheincode_amazon_kindle.pdfIn PDF document text
    • http://raffle.website/rock_hero_2_mod_apk_downloady0u0r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451018/normal_5ff81aced7081.pdfIn PDF document text
    • https://cdn.sqhk.co/moserusoba/bidhbia/impossible_quiz_answers_level_45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379473/normal_6012fb1a2a8be.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bibarixe.epizy.com/bochk_asset_management_limited_annual_report.pdfIn PDF document text
    • http://faripemisale.rf.gd/misijijasafi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/395ad189-38ea-44ac-a139-d6488ceaed19/in_the_heights_movie_casting_call.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6222bbd-6101-4727-89c0-aea5e240f6fe/how_do_i_control_the_volume_with_my_altice_remote.pdfIn PDF document text
    • http://futivel.epizy.com/the_chronicles_of_narnia_movies_trailer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6c8c458-8273-442e-8820-cf80b4516ec4/dolofiwemusasivajowe.pdfIn PDF document text
    • http://nenefebazowepo.rf.gd/nikon_coolpix_l610_battery_door_replacement.pdfIn PDF document text
    • http://joboberunora.rf.gd/67586028345.pdfIn PDF document text
    • http://resawopo.epizy.com/embedded_operating_system_software_examples.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_off0000d8d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D1 5332 bytes
SHA-256: 767ff0158b96658a2296861c3b7769cad5bb0e2dfbed51d46a3670a3259a0bce
font_01_sfnt_off0000eb0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0F 14580 bytes
SHA-256: 50f5dc95831faa47546b2e713759baae33b99ab8f8ca2446b43f9645d49cb5c8