Malicious PDF — malware analysis report

Static analysis result for SHA-256 81fd29406decee3b…

MALICIOUS

PDF

71.8 KB Created: 2021-01-31 01:27:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 00a500309481b60cf9e54bca34ad113b SHA-1: 954f8fd24f6608c368500025136cfdaa735a7bf0 SHA-256: 81fd29406decee3beb4d443a1332981440e226f8075da6af29ef5be5f166450f
126 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It contains numerous external links, including one that appears to be a search result for 'ps4 second screen for pc', likely a lure to direct users to malicious sites. The presence of embedded URLs and the overall structure suggest it's designed to exploit user curiosity and lead them to potentially harmful content.

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/wb?keyword=ps4%20second%20screen%20for%20pc PDF link annotation
    • http://fasad-dom.site/holland_america_cruise_inclusionsh6526.pdfIn PDF document text
    • https://mejotozoferu.weebly.com/uploads/1/3/4/8/134866749/tupelisereloza.pdfIn PDF document text
    • https://nupetumagapet.weebly.com/uploads/1/3/1/8/131859993/0794023d1910c.pdfIn PDF document text
    • http://nosinoski.shop/gunenogitibabir255hj.pdfIn PDF document text
    • https://wosapinilesodiw.weebly.com/uploads/1/3/5/3/135347506/witomelevodef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365659/normal_5ffa0587976bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473044/normal_5fe65499d66d7.pdfIn PDF document text
    • https://vumizopefi.weebly.com/uploads/1/3/5/3/135313358/pamebajap-sudoz-xuwododup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449177/normal_5ff05e56598a0.pdfIn PDF document text
    • http://graatorama.space/dijumizuli0gikt.pdfIn PDF document text
    • http://wisitens.online/board_games_for_3_year_olds_at_home6uuqd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000deb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB8 4996 bytes
SHA-256: 33c5e90c196450a34be446155a86227dd6a4f8f1a973c058c6193a95b84a003a
font_01_sfnt_off0000efd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD1 10212 bytes
SHA-256: bdecce4aefa41f574e96064e06e70f770a1b21ace0c3900ab9a0040efc9fba02

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