Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ebbeb598e06b03b…

MALICIOUS

PDF

76.6 KB Created: 2021-04-18 16:46:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 2395841316041c6759569369e8b04f44 SHA-1: a6386f47cd6d77069ca928af8ba8d97a0c8309f5 SHA-256: 1ebbeb598e06b03b20d2561fee599cb790961f744a4e975b6fd974989f139cd3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded URLs and heuristic detections indicating it functions as a link farm, directing users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/strik?utm_term=how+to+install+switch+for+garbage+disposal PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4499635/normal_601f68b36df01.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/ftmzGjc/wikisatuzijafotusokuvi.pdfIn PDF document text
    • http://richmaya.site/37901938461epl2r.pdfIn PDF document text
    • https://cdn.sqhk.co/dugudumopup/gf6d0ie/deep_learning_specialization_coursera_free.pdfIn PDF document text
    • http://lg-supportteam.com/hitchhikers_guide_to_the_galaxy_book_age_ratinghbd88.pdfIn PDF document text
    • http://vkrowl.com/price_of_skyworth_tv_in_nepalcs258.pdfIn PDF document text
    • https://cdn.sqhk.co/widobixi/Viftia1/analogue_and_digital_communication.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopaji/6Djeggc/71518434389.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/Coljfza/20686375296.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416811/normal_601d4f1a5e8cd.pdfIn PDF document text
    • http://manthoughtswebsite.website/9532305121229o0e.pdfIn PDF document text
    • http://brumbum3.xyz/178391548077ot7e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384650/normal_5fe39f92a49ea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3940561-375b-4e9c-8b8f-1cefb5c86e24/49349796585.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ffd6875-84af-4acc-9cc2-9ad8ca248183/modelo_de_minuta_de_constitucion_de_empresa_eirl_peru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43745a2b-f566-495e-b490-942fb60d9af0/how_to_reset_bontrager_trip_300_bike_computer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b74272f0-efcf-4046-b2b7-02355e382da2/two_way_radio_headset_for_motorcycles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c184aa3-2be5-43ae-8b76-32a9ffaf6759/fenoxomaji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09d6046e-4b83-4c30-9ab6-ef2237a265ae/walter_benjamin_aura_photography.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e18f8e1-4526-4010-aecc-0376da0a7268/my_liftmaster_garage_door_remote_is_not_working.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_off0000ee1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1D 5612 bytes
SHA-256: 3bd39e5e5d011d4a1a817dbff399e4811531ef284e31db5256e188b7a2e93797
font_01_sfnt_off00010136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10136 10452 bytes
SHA-256: 8c3180a8f6767bf1bc2a0a48c7031f65ecc3c2386b3be04515422e3cd46b8d99

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