Malicious PDF — malware analysis report

Static analysis result for SHA-256 fab469d108537d42…

MALICIOUS

PDF

69.1 KB Created: 2021-01-28 11:45:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b9df1afe4147960120e8f4a8e2e25546 SHA-1: 15b87a1ff68c42d3b825e48dd5fbca6790f75dd3 SHA-256: fab469d108537d42477fb01e5fbcc50dfcf3bfeeca99623cd6392ca7ca74f911
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains or suspicious-looking subdomains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports that this PDF is designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/123?utm_term=la+casa+del+futbol+presentadores PDF link annotation
    • https://cdn.sqhk.co/xokunafuse/Oid7njj/jedinov.pdfIn PDF document text
    • https://cdn.sqhk.co/boguzivipel/bSjehbH/new_english_songs_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/disonixures/hcGF1ha/word_cookies_chocolate_3_special_level.pdfIn PDF document text
    • https://cdn.sqhk.co/tutogalubete/igW2ujb/tefuba.pdfIn PDF document text
    • https://cdn.sqhk.co/losegiro/hgMggie/19027063726.pdfIn PDF document text
    • https://cdn.sqhk.co/vexapalas/mhieegh/errday_big_baby_tape_bpm.pdfIn PDF document text
    • https://cdn.sqhk.co/samivegin/e2hhLV8/95240965272.pdfIn PDF document text
    • http://linogozajasupe.22web.org/vaaste_video_song_wapwon._live.pdfIn PDF document text
    • https://cdn.sqhk.co/fifapupifig/ihegcNz/house_party_2020_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/fomeluxilim/HJhdbjd/kigoxenenosas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xibiwoziveva.epizy.com/bus_terminal_design_requirements.pdfIn PDF document text
    • http://pamiwumewamem.epizy.com/55060969623.pdfIn PDF document text
    • http://bigofufujenu.epizy.com/alesis_sr_16_manuale_italiano.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/20528393936.pdfIn PDF document text
    • http://povasapodojika.epizy.com/48136041785.pdfIn PDF document text
    • http://tixuxunu.epizy.com/fozosivir.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_off0000ceb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB9 5228 bytes
SHA-256: ad2a5dd70fb9138f8bee0714cade3791a9693c5ee0841754a241cb538deb863d
font_01_sfnt_off0000e08b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08B 11320 bytes
SHA-256: 7600c9661258b72ea9fce461e36c5da77b3799d80562a4231e8202df7b617662

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