Malicious PDF — malware analysis report

Static analysis result for SHA-256 52abcb66a037e9c7…

MALICIOUS

PDF

83.6 KB Created: 2021-04-05 16:44:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 26711464d0a9ebea551b27cc52bd112d SHA-1: 88e1fabcd76464ebbeac753a1f3ee693d5aa1e32 SHA-256: 52abcb66a037e9c767fcc14cd997e65df9d5dcb4232a668b60e45f39395356f5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was detected by multiple heuristics, including a high-confidence ML classifier and ClamAV, as malicious. It contains numerous embedded URLs pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The PDF structure and numerous external links suggest it is designed to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=resumen+de+el+libro+la+leccion+de+august PDF link annotation
    • https://jopuwijexanubuf.weebly.com/uploads/1/3/0/8/130874501/duvamajip.pdfIn PDF document text
    • http://honbiz.pro/honeywell_pro_6000_service_manualljtmn.pdfIn PDF document text
    • http://bettyloustintruckbbq.com/mia_and_sebastians_theme_piano_sheet_music_advanced9tzny.pdfIn PDF document text
    • http://tb-films.ru/flixster_video_download_location4oc3b.pdfIn PDF document text
    • https://wijugola.weebly.com/uploads/1/3/2/3/132303023/jojunixawofimaj.pdfIn PDF document text
    • https://bamigabimav.weebly.com/uploads/1/3/1/6/131636977/sejixupiluli_lapekexogu.pdfIn PDF document text
    • https://cdn.sqhk.co/zodozane/gpEhgWP/baby_growth_percentiles_calculator.pdfIn PDF document text
    • http://reduslim-europa.site/86768022511ks2v6.pdfIn PDF document text
    • https://sotemupavunu.weebly.com/uploads/1/3/1/4/131413148/maradujemojib.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvonusebex/jbFoMeW/electronic_music_maker_free_software.pdfIn PDF document text
    • http://mail-autoscout24.net/fopuvovitadewudasevalouy6ik.pdfIn PDF document text
    • https://cdn.sqhk.co/fixefalid/ijWghia/vakudapadatarewojem.pdfIn PDF document text
    • http://lunesygets.xyz/run_run_super_v_cartoonnzqi5.pdfIn PDF document text
    • http://formverifiedbadge.com/what_is_confucianism_taoism_and_buddhism_in_chinaqlofo.pdfIn PDF document text
    • https://cdn.sqhk.co/xugosovemi/flagehf/gaming_box_for_xbox.pdfIn PDF document text
    • https://cdn.sqhk.co/nonuripot/gcgfhaA/89019573943.pdfIn PDF document text
    • http://shothard.site/sinatumivetinogodefud3h7lv.pdfIn PDF document text
    • https://buzotenugi.weebly.com/uploads/1/3/1/4/131408099/ef27e72adb3f.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/05287bea-a8b6-4829-8b73-ce8bbef8f9a5/somitefizojawosewazikiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18699da9-8cdb-4489-88e5-d7257f430e57/52932524820.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_off000107d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D6 5404 bytes
SHA-256: 1460c19a31dc69addd48d2dc3214b5b9628db0a720dce7bc7fcad9f12beec8a5
font_01_sfnt_off00011a1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A1B 11668 bytes
SHA-256: 89af0833a5f9a6003274237328a877a5e3d1d6d931fb5213c8f0729ccbf8421d

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