Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e3a0a34effe22df…

MALICIOUS

PDF

68.9 KB Created: 2021-02-22 08:59:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 88d1e5c66e7974f5a19e446ac12cd9b3 SHA-1: 246d99f159ee4b53067b60b50ee5cd2e4270bb0f SHA-256: 8e3a0a34effe22df7dcd96dbe86153bfe3dc262eee42364763eaf65971333944
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one pointing to 'https://maypoin.ru/strik?utm_term=how+to+pair+bluetooth+headset+with+panasonic+phone', suggesting a phishing or malware distribution lure. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, further supporting this. ClamAV detection as 'Pdf.Phishing.Trojan' confirms the malicious nature. No scripts were extracted, but the presence of external links and the phishing detection strongly indicate a malicious intent.

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://maypoin.ru/strik?utm_term=how+to+pair+bluetooth+headset+with+panasonic+phone PDF link annotation
    • https://tesiligozi.weebly.com/uploads/1/3/1/4/131407846/fc792e66ee0.pdfIn PDF document text
    • http://aarbuz.space/movie_trivia_quiz_sporcle97yok.pdfIn PDF document text
    • http://wersita.space/principios_de_auditoriasjki8.pdfIn PDF document text
    • https://cdn.sqhk.co/webaxepibi/hjSjgii/amazon_seller_central_uk_telephone_number.pdfIn PDF document text
    • http://premial.su/91326673850nl4tk.pdfIn PDF document text
    • https://cdn.sqhk.co/gisanewat/SWqhijc/defender_max_hd10_top_speed.pdfIn PDF document text
    • https://jesisime.weebly.com/uploads/1/3/4/8/134886507/futefaduvuzuwos-kilurafibegukoj.pdfIn PDF document text
    • http://bestgirl69.com/grooming_services_visual_basicmak03.pdfIn PDF document text
    • https://cdn.sqhk.co/litonesi/jg7xlij/make_it_perfect_game_answers_level_156.pdfIn PDF document text
    • http://mebelintera.ru/psychology_11_edition_myers2542i.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/mogedozara/employment_agreement_form.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/15384896795.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/11457158681.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/lantus_insulin_dosing_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/capture_screen_android_xiaomi.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_off0000cd46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD46 5356 bytes
SHA-256: e2922845ef382e7f6d8f3232ba97045ec180de2e17f1e7e309bd300b9f949236
font_01_sfnt_off0000df77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF77 11700 bytes
SHA-256: 99f81bf9e931662604cbdfbb20e51f2b99c88b71b341470e7a7a1104aa325e02

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