Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ea92be47fd25e9e…

MALICIOUS

PDF

77.7 KB Created: 2021-04-05 18:25:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 7bd7304961e14a23bb4ad1bd46a08edb SHA-1: 4dc4754e64b3d60dcdda802c904e01feb33d8159 SHA-256: 3ea92be47fd25e9e2c5b83a4a04950714d3014aa13647a4322c51d4a82d5bb57
126 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a phishing or malware distribution lure, as indicated by the ML classifier and ClamAV detection. It contains numerous embedded URLs pointing to disposable hosting, suggesting an attempt to distribute malicious content or redirect users to phishing sites. The document body, though partially corrupted, appears to be a deceptive lure related to textbook downloads.

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://botokaw.ru/award?keyword=inter+1st+year+economics+textbook+pdf+download PDF link annotation
    • http://dawaliwiji.22web.org/when_does_power_book_of_ghost_come_back_on.pdfIn PDF document text
    • http://suxoxaxowigab.scienceontheweb.net/33714342417.pdfIn PDF document text
    • http://napodosawukezob.getenjoyment.net/plant_cell_organelles_and_functions.pdfIn PDF document text
    • http://rakuwotakiko.22web.org/jufifisezibuzak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486054/normal_601ee9b217c3d.pdfIn PDF document text
    • https://cdn.sqhk.co/nawamuzimosu/jZiaijU/ruxadujevafogafibolibubuz.pdfIn PDF document text
    • http://bavewemelemare.iblogger.org/32108073018.pdfIn PDF document text
    • http://muzesumulel.getenjoyment.net/tefawubarijipogewemur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367013/normal_602caf21258fe.pdfIn PDF document text
    • http://fijeveg.iblogger.org/introductory_geographic_information_systems_jensen_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tovozovuzedu/YMSiijd/jokapezasinino.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478968/normal_60637276081ad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wixarebetiz.epizy.com/idiot_s_guide_to_succulents.pdfIn PDF document text
    • http://tomijejimener.epizy.com/tuxikiwevimowatat.pdfIn PDF document text
    • http://tuxefunuzire.atwebpages.com/sujet_brevet_2020_mathmatiques.pdfIn PDF document text
    • http://rafokusavuti.epizy.com/najupeduwedaniruwiva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f187e82-d5a8-4bb6-b8e7-4ea5bbcd6ab2/8593071956.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ad8798f-d4f2-42da-add3-d6a09a2f479d/zubulurolumadat.pdfIn PDF document text
    • http://zikukoji.epizy.com/bncc_ensino_infantil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0af4325e-eed5-4827-9a68-d9516b4b331c/how_to_pair_logitech_keyboard_case_with_ipad_air.pdfIn PDF document text
    • http://tuminexozuvino.atwebpages.com/used_progressive_reloading_press_for_sale.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_off0000f17e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17E 5756 bytes
SHA-256: ec5aa835e9e05dffb32a7a0d3bf1be0cc19e965ee2283538e1a045d198632e1f
font_01_sfnt_off00010521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10521 10704 bytes
SHA-256: a68f5fa26b411dd1184c5545500fc8368aa8044003a89b7f9ad64e9ad96d9d73

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