Malicious PDF — malware analysis report

Static analysis result for SHA-256 37ec349802f2b155…

MALICIOUS

PDF

72.8 KB Created: 2021-03-12 00:33:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 0075f0bacbdd6ec3cae888d08061640f SHA-1: df5389da2dfd5f69bb50056852978412ff684edd SHA-256: 37ec349802f2b155cc17a08aae7b0ad3d9a73321d5d79c2ab31554d952fc1203
126 Risk Score

Malware Insights

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

The PDF contains an external URI pointing to a suspicious domain, identified as a phishing lure by ML classifiers and ClamAV. The document body, though heavily obfuscated, suggests a deceptive pretext related to 'travel agency marketing strategy'. The presence of numerous URLs, many hosted on disposable domains, indicates a link farm designed to distribute malicious content or facilitate phishing.

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://pelibifir.ru/award?keyword=travel+agency+marketing+strategy+pdf PDF link annotation
    • http://big-ita.space/garmin_etrex_10_manual_espaolp7z17.pdfIn PDF document text
    • https://rolavakewuxilo.weebly.com/uploads/1/3/1/4/131407047/34a49c807e0.pdfIn PDF document text
    • http://luxibenuguk.getenjoyment.net/ketewepujobobata.pdfIn PDF document text
    • https://lamuwibosuzo.weebly.com/uploads/1/3/1/0/131071033/tunemanobesesar-pujasipakagoze-vumomijoromosux.pdfIn PDF document text
    • http://wildber.store/85332515736a0033.pdfIn PDF document text
    • http://help-feedback-amzn8.xyz/how_to_turn_off_jlab_air_sportzdy7y.pdfIn PDF document text
    • https://notaxivarem.weebly.com/uploads/1/3/4/6/134633458/7951225.pdfIn PDF document text
    • https://dafizigupiteg.weebly.com/uploads/1/3/4/4/134492389/5ddde6.pdfIn PDF document text
    • http://makedctl.site/tadubisowexunizebq5jdz.pdfIn PDF document text
    • http://vizit.store/270864071997lk3s.pdfIn PDF document text
    • http://googsnat.space/zilefiwxc5hk.pdfIn PDF document text
    • https://lelobetiladafan.weebly.com/uploads/1/3/4/4/134497055/8037984.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/zexozavo/netefuxi.pdfIn PDF document text
    • http://sawotopedexorod.epizy.com/center_button_in_form_bootstrap_4.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/chronicles_of_narnia_3_watch_online.pdfIn PDF document text
    • http://vexolofifete.atwebpages.com/52201390829.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/bachna_ae_haseeno_full_song_pagalworld.pdfIn PDF document text
    • http://lirepotinemos.rf.gd/m_a_final_ki_date_sheet_2019.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_off0000dfb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB4 5648 bytes
SHA-256: 7596690277f232b13cb7f5bb55be20df86ea6a41f7f7077f2464645b7ffe7c59
font_01_sfnt_off0000f2e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E5 10476 bytes
SHA-256: cfb65d62e2ceb6d279c140f390abcfe994b36c0f7b4ec46f5bb67345a3cf108f

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