Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e28189d78ad12d0…

MALICIOUS

PDF

80.3 KB Created: 2021-04-27 06:46:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55a029a2193b991e214ce5523ea0fa82 SHA-1: 7dc71b33f151c3dc5a57a6412a48a4c540607fd3 SHA-256: 8e28189d78ad12d057aab748b788431de01e759384986bef54e94f84cd4f9ded
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains and employing UTM parameters, indicating a link farm or phishing lure. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' strongly suggest malicious intent. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this. The embedded URLs are the primary indicators of compromise, likely leading to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://dafemum.ru/strik?utm_term=andrew+loomis+pdf+figure+drawing
    • http://salet.store/autocad_3d_bathroom_blocks_freeqcaqm.pdf
    • http://insta-sale.site/76376963032q0jhu.pdf
    • https://cdn-cms.f-static.net/uploads/4453344/normal_604f80d6ad373.pdf
    • https://cdn.sqhk.co/dimumaneda/hijihba/idle_war_tank_tycoon_mod_apk.pdf
    • http://kpupnov.pro/gipaporojefufuqgky4.pdf
    • http://mokenolovulonom.medianewsonline.com/balistica_comparativa.pdf
    • http://jojidasusesot.sportsontheweb.net/auto_ingles_para_principiantes.pdf
    • http://kilijosizujowo.medianewsonline.com/odisha_b._ed_question_paper_2020_download.pdf
    • http://fajesamosini.sportsontheweb.net/61823451182.pdf
    • http://lnstagram-blue-ticks.com/35364525097zyghp.pdf
    • https://static.s123-cdn-static.com/uploads/4387033/normal_5fc5fa0f0d531.pdf
    • https://cdn.sqhk.co/lelogivotosu/cwifyjy/border_lightroom_5.pdf
    • https://cdn.sqhk.co/joxusozomilo/hbgqggv/bizodito.pdf
    • http://albl.ru/miracle_ear_foundationiltke.pdf
    • https://static.s123-cdn-static.com/uploads/4448556/normal_5fdd44cf949ae.pdf
    • https://cdn.sqhk.co/fodibaniwe/iiamhef/17956333537.pdf
    • http://zegererevez.medianewsonline.com/3771008510.pdf
    • http://sozapemogoz.mygamesonline.org/wozig.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wobuzisibal/assassin_s_creed_unity_mod_apk.pdf
    • https://s3.amazonaws.com/jazamerijekufol/baby_video_songs_free_malayalam.pdf
    • http://piwakitidi.onlinewebshop.net/management_information_systems_managing_the_digital_firm_15th_edition_ebook.pdf
    • http://napamewa.atwebpages.com/63298281076.pdf
    • http://gixufedexakav.atwebpages.com/gk_capsule_july_2020.pdf
    • http://zisukuvi.atwebpages.com/is_chicco_fit2_worth_it.pdf
    • https://s3.amazonaws.com/medaliwifufugel/como_se_formou_o_absolutismo_na_frana.pdf
    • https://s3.amazonaws.com/donarepemi/an_age_of_kings_cast.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1ed.bin
1c1b333e53a71693c55fd34b1b9cc7bb23ec0d5a8505dc20c3fc360e2ea8b36e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1ED 5444 bytes
font_01_sfnt_off00010462.bin
1e34f35353675d3d4f94fb95afe64769ee4228445940c6dffb771d60c669ed9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10462 2012 bytes
font_02_sfnt_off00010e0c.bin
165c056b47b3ed47610a5697c4fb4cd5404beef12a5e4f8a4243d8b1ed00c345		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E0C 11256 bytes

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