Malicious PDF — malware analysis report

Static analysis result for SHA-256 49ce1b719530bd8e…

MALICIOUS

PDF

87.2 KB Created: 2021-02-01 22:52:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 515d3214c35f2b5ae5107bc9fea0e29e SHA-1: eaf09ee285e2f029bc09720e2fb797ff1dae9b2a SHA-256: 49ce1b719530bd8e54d12ef127cd1b6e9871db548526a300d997067b8b400ca8
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML and ClamAV, indicating malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a phishing or malware distribution campaign. The presence of external URIs and the 'link farm' heuristic strongly support this attack pattern.

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://jottigo.ru/123?utm_term=bud+light+bottle+pool+table+light PDF link annotation
    • https://cdn.sqhk.co/kewesowovim/HgeEifM/tomer.pdfIn PDF document text
    • http://christinaanddavid2019.com/minecraft_for_android_download_free61psl.pdfIn PDF document text
    • http://return-0.com/police_gun_auctions_washington_stateqxcml.pdfIn PDF document text
    • http://1xbet-sportstavki.fun/recarga_facil_vivo_numerol5rby.pdfIn PDF document text
    • http://dkblogin-de.best/script_writing_template_for_studentsavvet.pdfIn PDF document text
    • http://com-connexion.xyz/59518947691rmyxe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497369/normal_5ff4a2408b6ab.pdfIn PDF document text
    • http://vzruvayarttraff.xyz/toggle_off_traduzioneg4g75.pdfIn PDF document text
    • http://itravelimpressions.com/mifexinekuwunpu90.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/ghzJija/music_hero_rhythm_beat_tap_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481406/normal_5ff3b7742b422.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/OgittAZ/84301745843.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365662/normal_600a734b00ac1.pdfIn PDF document text
    • http://ampinternational.org/how_to_hack_agario_masse70rs.pdfIn PDF document text
    • http://discount50it.pro/zamejomekevilakepovuzivalprer.pdfIn PDF document text
    • http://chebsvet.ru/libro_economia_1_bachillerato806qp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454995/normal_5fd1f31c1d5c9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/ielts_vocabulary_speaking.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10818 4912 bytes
SHA-256: 11a169a82724e6c1ffb243a9c92e0a8200ce3d5bc5efa9245ee65b005fe53fe2
font_01_sfnt_off000118d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D4 11936 bytes
SHA-256: 4302628e9532a089723f2bae209c650d8b6616e3e1d4c7dddb5d1bc3b88e7a8f
font_02_sfnt_off000140f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140F5 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333