Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7488fa7bd2964a6…

MALICIOUS

PDF

84.3 KB Created: 2021-02-24 15:53:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 21dc03ba19969671e41e5c76dab07189 SHA-1: b7f05854abaaedf06a10b6428c43b7131743c7ea SHA-256: e7488fa7bd2964a6c72cccb777df5b5ac8e4d2845705952067d6f470734d5273
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URLs, with one prominent URL pointing to a link farm designed to redirect users. The presence of embedded URLs and the heuristic indicating a link farm on disposable hosting strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=burger+king+breakfast+menu+prices+philippines+2020 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4471083/normal_601872fb80c93.pdfIn PDF document text
    • http://ital-tess.space/537909450227yt6t.pdfIn PDF document text
    • http://shoppermarket.online/ssd1_certificate_of_completiongcem9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416128/normal_601ff860e4f8a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498834/normal_5ffd00facbde4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465703/normal_5fdd9a975ef36.pdfIn PDF document text
    • http://sellforce.ru/pokemon_season_3_episodes_in_hindi_downloadeye0j.pdfIn PDF document text
    • http://gnatural.space/49307639821ej7rd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497697/normal_5ff45ef6ab38f.pdfIn PDF document text
    • http://wosatonosefenaw.iblogger.org/music_albums_in_zip_format.pdfIn PDF document text
    • http://dfahsdfgjsfg.online/43583358909yn9ug.pdfIn PDF document text
    • http://ca-management.website/jixubobajbivk.pdfIn PDF document text
    • http://zelopaqq.xyz/nerelofy80jh.pdfIn PDF document text
    • http://floradoma.net/faxenidovaboxozekufamksrz3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zituramipexi.epizy.com/clair_de_lune_piano_sheet_music_beginner.pdfIn PDF document text
    • http://vujofif.epizy.com/29556938839.pdfIn PDF document text
    • http://beruleruz.rf.gd/serajituwakudebejeged.pdfIn PDF document text
    • http://xifetofaramil.rf.gd/snes_emulator_for_psp.pdfIn PDF document text
    • http://zopefunexot.epizy.com/os_coliformes_totais_e_termotolerantes.pdfIn PDF document text
    • http://kiwozoma.epizy.com/liwesijalikigejon.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E8 5956 bytes
SHA-256: 78da797c3636116fc0cb7a1c073bbccdcf22410ff9cdee58607f91100e1427ef
font_01_sfnt_off0000f907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF907 3128 bytes
SHA-256: 323a7aac830d6850df163a43334aa7d641a6d645b5534ddec4dc3cff1004f1d5
font_02_sfnt_off000105cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105CB 11540 bytes
SHA-256: 83e39419926d4b44b0da2ea8eabd53da51802529bc1fe2966e23506bf54a3dae
font_03_sfnt_off00012cf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF8 16312 bytes
SHA-256: bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939