Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad573975e9a347dd…

MALICIOUS

PDF

77.6 KB Created: 2021-05-07 10:48:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 769603e6ee1444c956cc9c50e3d279c3 SHA-1: 5031d21b802dfe9615baa3470bf27839cba218e4 SHA-256: ad573975e9a347ddd87f2fc6fccd0e43aca6a11a82c78385319d60cbb140e2a2
126 Risk Score

Malware Insights

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

The sample was flagged by ML and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain that is likely used to host malicious content or redirect to phishing sites. The PDF structure and embedded links suggest an attempt to trick users into visiting these external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xajibur.ru/strik?utm_term=against+interpretation+and+other+essays+penguin PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379034/normal_5ff9e1e83d396.pdfIn PDF document text
    • http://kilesetemopibaf.22web.org/tajawejanoseluburo.pdfIn PDF document text
    • http://xavamifisu.22web.org/larawan_ng_mga_bayani_ng_pilipinas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477379/normal_601ef389416be.pdfIn PDF document text
    • http://legobibeli.22web.org/40588725365.pdfIn PDF document text
    • https://mofumamivuzav.weebly.com/uploads/1/3/1/0/131070192/pelazebujudejibono.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458615/normal_5fe85948d590f.pdfIn PDF document text
    • https://cdn.sqhk.co/lomuwomigez/aDjgghb/delicious_vanilla_cake_recipe_from_scratch.pdfIn PDF document text
    • http://lanejaselisipu.22web.org/arya_dj_remix_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/mixaluwekitu/hicyBhg/degitujuxazibeg.pdfIn PDF document text
    • https://cdn.sqhk.co/widiroje/eFsyyih/moore_theatres_plainwell.pdfIn PDF document text
    • https://cdn.sqhk.co/bilexodofose/geXYmhi/versatile_meaning_in_english_with_example.pdfIn PDF document text
    • http://ginisuna.iblogger.org/basic_english_grammar_books_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/jdaiaYE/t_mobile_tuesdays_app_code.pdfIn PDF document text
    • https://gazodajatara.weebly.com/uploads/1/3/2/7/132712558/2772072.pdfIn PDF document text
    • https://ziwivebagojub.weebly.com/uploads/1/3/1/8/131871618/xolejek_senizik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426422/normal_60339a8134062.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sonituzesubilit.epizy.com/download_small_pro_gratis.pdfIn PDF document text
    • http://rubidolad.epizy.com/naxobezigulometas.pdfIn PDF document text
    • http://xogopaneb.epizy.com/31052428603.pdfIn PDF document text
    • http://rovuritag.rf.gd/how_to_describe_a_sunset_to_a_blind_person.pdfIn PDF document text
    • http://mizosepalivugus.rf.gd/brain_teaser_interview_questions_answers.pdfIn PDF document text
    • http://jajojamoxarug.epizy.com/best_antenna_tuner_for_yaesu_ft-857d.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_off0000f009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF009 5280 bytes
SHA-256: 82ec3947b96d9ef46266c40ee6ab7338058360c61d32b3383d4e91464032ae14
font_01_sfnt_off00010204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10204 10868 bytes
SHA-256: 7b836c444db9418da2cb3d6a4a8eab46611cc366961b9024ceb1fa85fc713a01

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