Malicious PDF — malware analysis report

Static analysis result for SHA-256 086e1ff18d8580a1…

MALICIOUS

PDF

77.3 KB Created: 2021-03-30 23:31:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 5c1c1da34c2e3c0376daa3096066ea4d SHA-1: 7f141ad427904ddcc06796f6ee213000c18074f4 SHA-256: 086e1ff18d8580a1a5d8c697814299b0fd04874b5cceb96d8a7c72b10af574a8
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, suggests a lure related to search results for lyrics, which is a common tactic for distributing malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/award?keyword=abba+happy+new+year+lyrics+pdf PDF link annotation
    • http://kavademive.sportsontheweb.net/77144613527.pdfIn PDF document text
    • http://siviveko.getenjoyment.net/leguradapuvudumawebopimoz.pdfIn PDF document text
    • http://itnegozio.info/is_chrome_os_safe_for_online_bankingr2j2n.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/como_consertar_um_fone_de_ouvido_da_apple.pdfIn PDF document text
    • https://cdn.sqhk.co/zapimafe/c7S7iec/80025502972.pdfIn PDF document text
    • http://salonlabs.xyz/proform_hiit_trainer_pro_vs_bowflex_m7sg1hp.pdfIn PDF document text
    • https://cdn.sqhk.co/vupapevixu/hjgjghc/adobe_illustrator_logo_free.pdfIn PDF document text
    • https://cdn.sqhk.co/fovuxugo/nhgXZz6/51978269068.pdfIn PDF document text
    • http://mazafaka69pussy.online/94823090242cza3e.pdfIn PDF document text
    • https://cdn.sqhk.co/waxubisolo/ZdkQibF/16514912653.pdfIn PDF document text
    • http://ihsteam.ru/papinarapedabobabepuf7tmg.pdfIn PDF document text
    • https://cdn.sqhk.co/nezuxada/bDkhaha/skyblock_seed_xbox_one_2020.pdfIn PDF document text
    • http://gatofupimekow.mywebcommunity.org/sebovurabupororemefo.pdfIn PDF document text
    • http://fullstacket.online/how_to_meditate_for_lovergyqu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/665103c7-3895-4579-8747-003ef708ac2c/gledai_filmi_online_bg_audio_2018.pdfIn PDF document text
    • http://bavatesivo.myartsonline.com/waponatufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0bb2b86-1da3-4960-9d42-debda2d833c0/swimming_to_lose_weight_mens_health.pdfIn PDF document text
    • http://wijogural.epizy.com/report_downed_power_line_dte.pdfIn PDF document text
    • http://talifox.rf.gd/whats_a_good_red_wine_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75ad4234-87d6-44ec-a8e3-9ed31e9d4460/do_you_have_to_pay_for_twitch_prime_sub.pdfIn PDF document text
    • http://xisoduxazokupi.rf.gd/adobe_acrobat_reader_mac_os_mojave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2af33af-c8b3-4c42-8843-ab1c0839bb8d/bersa_thunder_plus_pistol_review.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_off0000e6c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C7 5568 bytes
SHA-256: 41cd6e7d28236323497870f8301d9632fe227e2fc1881883e0875c326160f88d
font_01_sfnt_off0000f9c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C3 21260 bytes
SHA-256: 748eaf1f86e5a5de60705fe44d7be43c43cd06c1495a40c40aadcf871aec8284

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