Malicious PDF — malware analysis report

Static analysis result for SHA-256 c44ea4f05339b270…

MALICIOUS

PDF

76.6 KB Created: 2021-05-11 05:43:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 58a64d17c42706b94f07dd9f302d4f70 SHA-1: ac4d362f8dc5a5cbc2ae8a606bdf5dec41abff1c SHA-256: c44ea4f05339b27006ad452a7965f82151524ab82e98da24c8c8a2e725364ace
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, many of which point to disposable hosting and are part of a link farm. One prominent URL, 'https://jottigo.ru/strik?utm_term=zagg+ipad+keyboard+not+working', suggests a lure related to technical issues. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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/strik?utm_term=zagg+ipad+keyboard+not+working PDF link annotation
    • https://cdn.sqhk.co/vefutifeves/aicIwyt/driver_canon_ip2770_for_mac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529281/normal_6029936612b64.pdfIn PDF document text
    • https://cdn.sqhk.co/zerumowo/cgjSdgh/31038266296.pdfIn PDF document text
    • https://cdn.sqhk.co/fakineduxafe/jdv4iil/border_light_wallpaper_ios.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • https://cdn.sqhk.co/wememiguw/ihnijgc/nicki_minaj_husband_jail.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372080/normal_60078c7205bee.pdfIn PDF document text
    • http://cherrypimp.online/robin_hood_live_action_disney_cast7sxa3.pdfIn PDF document text
    • http://igcopyrightclient.com/fagadegemesuxenezgpqg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422147/normal_606e9fb2a723d.pdfIn PDF document text
    • http://lnstagram-helping.live/matched_betting_guidaem1tq.pdfIn PDF document text
    • http://cmbespaceclient.xyz/56985181557q66qc.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/cc23d1c9-1aab-4126-b055-eb3164988d99/test_para_inteligencias_multiples.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/andyroid_for_macbook.pdfIn PDF document text
    • http://vugapadilubokis.epizy.com/best_answers_for_common_job_interview_questions.pdfIn PDF document text
    • http://jugututinotu.rf.gd/fastanime_watch_anime_online_tv_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d355db0d-1641-4c87-9a53-622554f19bab/darkness_visible_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6de620a7-6cee-47e5-9e86-e6d981af5dfd/jalab.pdfIn PDF document text
    • http://sonasekofuxix.rf.gd/74866246714.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/osrs_solo_bandos_guide_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52062bd2-3582-4f4e-8a47-4075adeea528/tappan_gas_stove_knobs.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/how_much_is_andrew_wommack_worth.pdfIn PDF document text
    • http://gevorewububew.epizy.com/manual_propietario_chevrolet_captiva_2008.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_off0000ec9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9D 5272 bytes
SHA-256: 4edf0950e43adef11d4eb1a833fa238d30e339690c8de5564546484e2d1f9311
font_01_sfnt_off0000feb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB6 11180 bytes
SHA-256: fa79ae8ef6e55701144b28c69503776ffb152f4cffd2b64c4bb9173b2ddacc9d

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