Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f5406ea80965cc0…

MALICIOUS

PDF

72.1 KB Created: 2021-03-20 09:50:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1474e5ce5e984073c4119d78044c2ab SHA-1: 7232c7a2345f9b2a0151eff7108f35090c7999df SHA-256: 9f5406ea80965cc0ebafd95316ed35ffd28709efc60365c1a6059a7667500f72
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, as indicated by the 'PDF_SEO_LINK_FARM' heuristic, suggesting a link farm or redirection tactic. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics confirm its malicious nature, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the presence of numerous external URLs points towards a phishing or malicious content delivery attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/wix?keyword=house+baratheon+sigil+iphone+wallpaper
    • https://cdn.sqhk.co/mevazasid/eCQXjb8/hitman_2_sniper_rifle_unlocks.pdf
    • https://narapafugoziror.weebly.com/uploads/1/3/0/7/130775848/9e2ab1880a47e3e.pdf
    • https://cdn.sqhk.co/laxiroroweno/hhgvzal/no_crop_online_for_instagram.pdf
    • http://femetorisufi.sportsontheweb.net/relipis.pdf
    • https://cdn.sqhk.co/kipaselofuza/hh6Ajaa/bilingualism_multilingualism.pdf
    • https://cdn.sqhk.co/xovujiroveg/chfVgei/princess_libby_little_mermaid.pdf
    • https://cdn.sqhk.co/fujalapevame/d6WjiJX/best_sonic_skins_for_minecraft.pdf
    • https://widufosonetorif.weebly.com/uploads/1/3/4/5/134598319/6bcb7aa74.pdf
    • https://cdn.sqhk.co/kokedipemi/heShhgc/free_2nd_grade_math_learning_games.pdf
    • https://cdn.sqhk.co/vonezositixi/hjdid5e/constitutional_democracy_definition_geography.pdf
    • http://korixoludofuguk.scienceontheweb.net/astrology_books_in_bengali_free_download.pdf
    • https://vipegiwofavagob.weebly.com/uploads/1/3/5/3/135302795/zased-sunonakalas-zurabisuku.pdf
    • https://cdn.sqhk.co/sevigexew/iiQlhjF/project_schedule_free_template_excel.pdf
    • https://nilezejexi.weebly.com/uploads/1/3/4/7/134737846/liborobewopuxis.pdf
    • https://risimukino.weebly.com/uploads/1/3/1/3/131383953/4514432.pdf
    • https://cdn.sqhk.co/gufojakig/cnDJ1je/best_amazon_gold_hoops.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/02c22615-76be-478b-8096-7c367825c66e/honda_hrx217k5vka_187cc_gas.pdf
    • https://uploads.strikinglycdn.com/files/58824362-c928-45a0-9bda-e48ca3dd5cf4/grants_for_public_school_field_trips.pdf
    • https://uploads.strikinglycdn.com/files/3ca034b6-e135-4d7d-a81b-162f7106bb98/where_do_you_find_a_piano_serial_number.pdf
    • https://uploads.strikinglycdn.com/files/8a67ece5-b9a0-4104-8a3a-3a16a2826ba9/sinizapavuxabuwuzavow.pdf
    • https://uploads.strikinglycdn.com/files/b7e11f9a-1624-4423-aca5-891d3f0fce0b/contabilidad_de_costos_libro_juan_garcia_colin.pdf
    • https://uploads.strikinglycdn.com/files/4a0f005c-6810-416d-a997-83ddfa89fc3e/how_much_is_mark_vincent_worth.pdf
    • https://uploads.strikinglycdn.com/files/df7e58d8-59d8-412e-a868-ca180995c6db/information_technology_jobs_in_waco_texas.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d168.bin
b3427a2886a2529818c27892801419d62d8df352de9b9f193b29d6996672347a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD168 5156 bytes
font_01_sfnt_off0000e2f6.bin
bd19a348fecd8cb18904a53a7829218f696786bf962b2445c039900f882bde76		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F6 10044 bytes
font_02_sfnt_off00010550.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10550 4324 bytes

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