Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb113e8d1f68f67e…

MALICIOUS

PDF

73.2 KB Created: 2021-03-09 05:17:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7574403883d3cfcfe0e637fedc9d877d SHA-1: a3784310dd465606164d35acaff8ff6fcd3707a3 SHA-256: fb113e8d1f68f67e3570874fa83d3da5075e5305bb22bead35c89dc5a9acf0dd
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a primary focus on 'https://maypoin.ru/award?keyword=belly+fat+cure+quick+meals+pdf'. Heuristics indicate this PDF is part of a link farm on disposable hosting, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/award?keyword=belly+fat+cure+quick+meals+pdf PDF link annotation
    • http://tamakedesununod.mywebcommunity.org/99693905690.pdfIn PDF document text
    • http://kewapejotok.22web.org/63972004316.pdfIn PDF document text
    • https://cdn.sqhk.co/muligumixe/VPBbhjU/juxiduzij.pdfIn PDF document text
    • https://cdn.sqhk.co/gemesikexo/apPnKhd/dobugodebigafelololu.pdfIn PDF document text
    • http://faxusigeroles.sportsontheweb.net/99322376792.pdfIn PDF document text
    • https://cdn.sqhk.co/togobetof/bighhrn/gixubikone.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rukosivujuxu.atwebpages.com/zuxiputafadevedino.pdfIn PDF document text
    • https://s3.amazonaws.com/pigolo/sector_46_faridabad_weather_report.pdfIn PDF document text
    • http://mevalegija.rf.gd/the_motorcycle_diaries_filming_locations.pdfIn PDF document text
    • http://zuputes.atwebpages.com/81724454326.pdfIn PDF document text
    • http://vuzuwukef.atwebpages.com/final_fantasy_7_original_ps4.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/834629277.pdfIn PDF document text
    • http://vewamekigobuzuw.epizy.com/vizio_vsb200_sound_bar_power_supply.pdfIn PDF document text
    • http://noratev.myartsonline.com/guwumopexoto.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/bovefu.pdfIn PDF document text
    • http://jafixomedimun.onlinewebshop.net/78050032308.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/mifodokujoruv.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_off0000e199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE199 5644 bytes
SHA-256: bb041c47fdc1561ae8cd23d8bef3512bd6d32b2430b5984ad5901a880ec3d6d8
font_01_sfnt_off0000f4c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C7 10240 bytes
SHA-256: a3e05b97e697276a55accd1a3546d945df07234bfda4faa5bf6ae14d03c97d7a

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