Malicious PDF — malware analysis report

Static analysis result for SHA-256 b811d8bd4be79473…

MALICIOUS

PDF

75.9 KB Created: 2021-03-13 22:02:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fbe0b3eeb0b954943601baa4a807795b SHA-1: 2c0cc28283701dc38a2cf560731f1096d7155423 SHA-256: b811d8bd4be794736cec7db1363c207bba3e96e7d3ed4242f657c57ca66a68a5
156 Risk Score

Malware Insights

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

The PDF document contains a significant number of external links, identified as a link farm, suggesting a tactic to manipulate search engine results or distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the presence of numerous external URLs points to the document's role in directing users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://botokaw.ru/award?keyword=metahuman+deepak+chopra+pdf+download
    • https://wozogerodinanu.weebly.com/uploads/1/3/4/4/134498855/16c74e32d8fdc.pdf
    • https://cdn.sqhk.co/birugafomafo/hjbfwMz/entrepreneurship_programs_college.pdf
    • https://cdn.sqhk.co/kovezozeseg/Shcujfc/46770415116.pdf
    • http://dominis.xyz/beats_studio_price_tagznr4a.pdf
    • http://ru-payment.casa/ee_cummings_love_poem_somewhere_i_have_never_traveledkk43r.pdf
    • https://dojilosadokadog.weebly.com/uploads/1/3/4/8/134890500/namimunelufoxulemoki.pdf
    • http://lifegirls.site/phonak_brio_4_vs_marvelpi25p.pdf
    • http://yogist.fun/13487565932o6q64.pdf
    • https://mikakegurotitu.weebly.com/uploads/1/3/4/3/134309030/betunapafanetuf.pdf
    • https://kuwumezebuxe.weebly.com/uploads/1/3/4/1/134131528/guvirukog.pdf
    • https://gavuwexis.weebly.com/uploads/1/3/4/7/134772394/lizoleput-mawojabatume-dixonogebuwi-bekanevesadake.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f9ce0285-c54e-4c3c-b792-4ece655edde9/why_is_my_hayward_pool_cleaner_not_moving.pdf
    • https://uploads.strikinglycdn.com/files/633d6563-e364-4c7f-a303-cdf2930bb53d/zunaxanewep.pdf
    • https://uploads.strikinglycdn.com/files/2184a7f2-78c5-423a-accd-ce8d80f26412/behringer_eurodesk_sx3242fx_manual_espaol.pdf
    • https://a2ae8793-a99f-480d-a3bc-849ef63d34f7.filesusr.com/ugd/cc207a_bd604427a0ca460eaab8d1fa26e7f665.pdf?index=true
    • https://7fe6b731-3703-45da-bcbe-faf39b4d3392.filesusr.com/ugd/880a7e_1b8f80ac01274770bfe99dc04c1ea36c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/803b9f00-df93-4ac5-a8ee-6cdebb9dc7e5/46748550516.pdf
    • https://uploads.strikinglycdn.com/files/366f380c-af6a-4e07-817d-132056bfecf9/jesidekozevatewomov.pdf
    • https://uploads.strikinglycdn.com/files/88a5b5e3-871f-46ee-9e0f-662f30b9a164/how_to_tell_which_elements_have_a_larger_atomic_radius.pdf
    • https://uploads.strikinglycdn.com/files/9124e706-8d8f-4247-95dc-1a4f068e1b1c/how_to_lead_a_team_in_retail.pdf
    • https://1ebfeea1-7d02-43b8-8f0a-002c87bc7f75.filesusr.com/ugd/50dcf6_d1c6b5c3c6e3445cb50f6e52c95446b9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/45744cb6-7657-405d-827d-7746ea88c2cd/98073488049.pdf
    • https://uploads.strikinglycdn.com/files/498c48e5-164a-442f-bc02-4474a4ae3da9/sword_art_online_fatal_bullet_gameplay_ps4.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9e7.bin
9767ac665949143727baab6a1c77fa7012093108da75464db2207976cfb0edd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E7 5376 bytes
font_01_sfnt_off0000fc27.bin
4c7104bf689d4cf4c808b6ca9a0b98cbe42889a45d911e176d8aeed29c97a7eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC27 11084 bytes

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