Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e33587d6e090cd1…

MALICIOUS

PDF

70.8 KB Created: 2021-05-19 15:15:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: cb4636f9f268d5a7ab70acd98ea4debd SHA-1: e1eed2058f7e5acb71effed154608c4c6fdfe8d0 SHA-256: 8e33587d6e090cd1ac0e38f71ac4d44fe5b05a20e000bf61f89d302f53876bc6
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. It contains an embedded URI pointing to 'https://maypoin.ru/strik?utm_term=neo+bomberman+rom+download+mame', which is likely a phishing lure disguised as a search result for game ROMs. The PDF also contains a large number of external links, suggesting it's part of a link farm designed to distribute malware or phish users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/strik?utm_term=neo+bomberman+rom+download+mame PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451356/normal_605f7664a3491.pdfIn PDF document text
    • https://fuvenaxumegiga.weebly.com/uploads/1/3/3/9/133999500/magegovomidezenajawo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418399/normal_5ffd218ab96bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405443/normal_605b3037ef24c.pdfIn PDF document text
    • https://felipivi.weebly.com/uploads/1/3/1/8/131856333/rufikenididujabovur.pdfIn PDF document text
    • https://pugiputofal.weebly.com/uploads/1/3/4/7/134740318/xutiravemalunuf.pdfIn PDF document text
    • https://xojakonokixamu.weebly.com/uploads/1/3/1/1/131164577/2217708.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wujodibu/how_do_you_dilate_by_a_scale_factor_of_1_3.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/jordan_belfort_straight_line_selling_video.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/68766740867.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c86dd91-b79d-4b75-b89e-11d8cf38cfda/faith_based_couples_counseling_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/355de1e7-36a0-4f08-8ce6-5031dedad8d0/the_salt_fix_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/mofopufi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3672bfc-22f2-4c22-8165-c489934d03f8/4171544915.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/lususizotapupowibofemedo.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/tizekisuwegixisativipiki.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/there_is_there_are_exercises_3_primaria.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/gabebom.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/i_am_that_i_am_peter_tosh.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/zaxogobaweneg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e55269dd-e917-44a3-aede-1a026b7114e0/nilunefadevawazizawukor.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_off0000d91e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD91E 4992 bytes
SHA-256: 190510f6e77a321360c4f4dacb73936c16a1e94c8711d0a14dd8cb258895858b
font_01_sfnt_off0000ea0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0F 9972 bytes
SHA-256: c0b27c0a1c81912ffdb4d172906000f4788abfa6047578cbd0635fe4f6a4cadc

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