Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ef1377a2bdee2f7…

MALICIOUS

PDF

84.7 KB Created: 2021-05-09 01:41:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 86b46090aff09885e6064fcc93c14828 SHA-1: 90590fc384473a935094eb1c5e99c3be02dbfe61 SHA-256: 2ef1377a2bdee2f7ee5571e329a1aeb7ec690565c8bd209138aa62f4c357e6ee
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous external links, suggesting it functions as a link farm or phishing lure, directing users to potentially harmful websites like 'kuzutuzo.ru' and 'temulisufijib.22web.org'. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest the document's purpose is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://kuzutuzo.ru/strik?utm_term=shimano+ultegra+di2+r8070+weight PDF link annotation
    • http://temulisufijib.22web.org/baxeridisoxir.pdfIn PDF document text
    • http://vevuxufaf.iblogger.org/golf_buddy_laser_1s_amazon.pdfIn PDF document text
    • https://dewufore.weebly.com/uploads/1/3/4/8/134857007/2b039a19794043.pdfIn PDF document text
    • http://frut-tree.site/81882234436zb69l.pdfIn PDF document text
    • https://ramogowerutamu.weebly.com/uploads/1/3/4/4/134488443/vatosa-robuvag-manaregeke-zokasisegede.pdfIn PDF document text
    • https://vasinurevesodux.weebly.com/uploads/1/3/4/6/134605286/7239286.pdfIn PDF document text
    • https://ninisajata.weebly.com/uploads/1/3/4/8/134869212/a40b90.pdfIn PDF document text
    • http://nesapumedavemag.iblogger.org/25509886755.pdfIn PDF document text
    • http://fitit.space/bizijobijasu2c1j1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5c2df1de-05ea-4e17-9aa3-38adc7ce3153.filesusr.com/ugd/ddd609_8e7475c8d29a43c29d59f147d05ce983.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gebukil/swtor_juggernaut_guide_6._0.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/50533842133.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/cakephp_form_helper_radio.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/who_owns_90_of_the_worlds_wealth.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/what_is_wd_tv_live_streaming_media_player.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/android_splash_screen_logo_animation.pdfIn PDF document text
    • https://6346cca1-8be9-442e-91e0-e35201572fa6.filesusr.com/ugd/a8c077_17ab6338ea5141d69c814bc6efc80c37.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bakoloj/gowuwezeb.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_off00010865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10865 5804 bytes
SHA-256: 48a7b372c8aee4eb3dfeaf486b6ede01e0267c5600a10ead4e160929be9e8e04
font_01_sfnt_off00011c07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C07 11848 bytes
SHA-256: e74926d8c7f0cf7bbec5512d2aaceb22429d6a6f8b8e3f18c1eb7d92a5a921de

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