Malicious PDF — malware analysis report

Static analysis result for SHA-256 07e563c4a8d72b4a…

MALICIOUS

PDF

79.5 KB Created: 2021-03-11 12:46:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1988971019a45f2120c69e1f355038f0 SHA-1: ee4ff25b6dc687d8b768cedea81b54b431d7e6a5 SHA-256: 07e563c4a8d72b4adda6b4f4ae3747355e75192ff6047099d01f6fa0c14ea7f4
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The presence of numerous external links, particularly the one to 'botokaw.ru', suggests an attempt to redirect users to potentially harmful content or phishing sites. While no scripts were explicitly extracted, the PDF structure and link farm heuristic point towards a phishing or SEO manipulation attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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/123?utm_term=los+sauces+algernon+blackwood+pdf
    • https://cdn-cms.f-static.net/uploads/4462065/normal_5fe9067baffed.pdf
    • http://jiteruruw.sportsontheweb.net/10690371977.pdf
    • https://cdn-cms.f-static.net/uploads/4475874/normal_5fe70ab7bc251.pdf
    • http://mawosatejojeka.sportsontheweb.net/kohler_command_pro_27_parts_diagram.pdf
    • https://cdn-cms.f-static.net/uploads/4489244/normal_603a258b2b1ce.pdf
    • http://rinujajija.getenjoyment.net/78331944991.pdf
    • http://guzoseta.getenjoyment.net/jerus.pdf
    • http://rajukilodagoje.mygamesonline.org/14505155225.pdf
    • http://niwadeg.mywebcommunity.org/how_to_open_flash_player_on_chrome.pdf
    • https://static.s123-cdn-static.com/uploads/4475212/normal_5fddd8dc93622.pdf
    • http://mamefumiwuto.mywebcommunity.org/juzosuparagulet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/joterige/91609038811.pdf
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_0066ce33b009407b996c8936b0995621.pdf?index=true
    • https://ca108e69-7b6b-43f0-8f16-d96ebeb8a33d.filesusr.com/ugd/79e0dc_6802eda363484c4e8a89b47571896524.pdf?index=true
    • https://s3.amazonaws.com/wujixus/is_2008_honda_odyssey_a_good_car.pdf
    • https://s3.amazonaws.com/jolituzoji/varokimisidimanajil.pdf
    • https://51bf459c-6b46-41b0-863f-532cf8a77e0d.filesusr.com/ugd/2eedf1_aad590a86b514558b665deb10c74a895.pdf?index=true
    • https://s3.amazonaws.com/tanapilamaxi/51328523615.pdf
    • https://59bb578d-b312-442a-858b-1a1a54b18a6c.filesusr.com/ugd/c79b1c_3d317a5f39c94cbd8dbca0e9256171ce.pdf?index=true
    • https://s3.amazonaws.com/tesodagiwor/bsc_magazine_march_2019.pdf
    • https://s3.amazonaws.com/kobivimelelo/how_to_write_a_skills_summary_for_a_resume.pdf
    • https://s3.amazonaws.com/pogolo/guided_reading_leveled_book_sets.pdf
    • https://s3.amazonaws.com/xefejevife/melee_barrows_guide_osrs.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_off0000f6af.bin
970dc4ca1788b63257ff64ea8bb079ea78a72c51e1d37227d142735b987f97db		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AF 5560 bytes
font_01_sfnt_off000109c1.bin
549341f5b5ef60437af154588e5140614cb9d55a9e9b28f9f20f7c616c1fcd83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109C1 10864 bytes

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