Malicious PDF — malware analysis report

Static analysis result for SHA-256 22eee8dc9fc49937…

MALICIOUS

PDF

69.3 KB Created: 2021-02-05 16:36:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 79465549c3390eff8e35c5a238d09766 SHA-1: bc61562b35c04ca47d3cc4a89c08689e6cdd3bc2 SHA-256: 22eee8dc9fc49937c1647811fe2407f956edc78184fede1cc1e4759c197d87a3
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, many of which point to benign-looking PDF files, suggesting a link farm or SEO poisoning tactic. One prominent URL, 'https://seumenha.ru/123?utm_term=the+last+witch+hunter+streaming+altadefinizione', is likely a lure to a malicious site. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/123?utm_term=the+last+witch+hunter+streaming+altadefinizione PDF link annotation
    • https://nipixajivoru.weebly.com/uploads/1/3/1/4/131436983/2facb8d7a778506.pdfIn PDF document text
    • http://kuzamejeluwezik.22web.org/gimorajozulijugipebemubun.pdfIn PDF document text
    • http://jelepasit.22web.org/nightingale_school_wanstead_uniform.pdfIn PDF document text
    • https://jelugofinetala.weebly.com/uploads/1/3/5/3/135389066/1463551.pdfIn PDF document text
    • http://pigovaze.iblogger.org/luxosenofopowu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475389/normal_5fde3b482cec2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446921/normal_5ff17ad0ddd38.pdfIn PDF document text
    • http://zekabivalejasaj.22web.org/evaluating_functions_worksheet_with_answers_and_solutions.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/vibasujefir/webrip_player_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/podejaluxemulorumowig.pdfIn PDF document text
    • http://guxasimedoki.epizy.com/escrow_closing_notice_template.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/jolly_phonics_letter_r_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/rafaxigefejadaguz.pdfIn PDF document text
    • http://gebibem.epizy.com/comic_papyrus_font.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/bominefafekutade.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/raligejebifuti.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/zusewani.pdfIn PDF document text
    • http://dobupefibukin.epizy.com/duribinorofozupuwe.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/wutenadofexezavisut.pdfIn PDF document text
    • http://wepirizifomonij.epizy.com/44286504143.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_off0000d2ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2AB 5528 bytes
SHA-256: 7105e4ca215e946b482ce7d490fbcac0db1326aba716dc8dac9201d850ad0cbf
font_01_sfnt_off0000e55f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE55F 10264 bytes
SHA-256: 0b8312c9bc8bb9f99110ceba312f6b201d6298d48c2b72278e6152a071076112

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