Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a3dd0ef0daf8966…

MALICIOUS

PDF

78.2 KB Created: 2021-03-17 23:10:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 79185c59ba41a9f38ebea081d0f7b8b7 SHA-1: 4f8e5cd7abb0ad5ca2880c23ac78bc707f4444e3 SHA-256: 0a3dd0ef0daf896680ae1ff41a3cac4790ccc47067073578f05394a3e7a87902
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, with one prominent URL pointing to 'mezovuduw.ru' which is associated with a lure for downloading 'plants vs zombies 2 apk free download'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of multiple disposable hosting links further supports a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/wix?keyword=plants+vs+zombies+2+apk+free+download+full+version PDF link annotation
    • http://logvoz.ru/force_and_laws_of_motion_class_9_ncert_solutionsjbub6.pdfIn PDF document text
    • http://kajipim.mypressonline.com/indian_dinner_menu_list_non_veg.pdfIn PDF document text
    • http://qlemelest.online/remstar_plus_m_series_manuali6elr.pdfIn PDF document text
    • http://rapoxarawiwalo.sportsontheweb.net/16342480638.pdfIn PDF document text
    • http://lizuzezusad.medianewsonline.com/gorirezejemimo.pdfIn PDF document text
    • http://fovikoxesaweziz.medianewsonline.com/dd_3.5_best_cleric_feats.pdfIn PDF document text
    • http://voirop.xyz/fesojidobefyz.pdfIn PDF document text
    • https://cdn.sqhk.co/nowovadizeb/fTHKia8/microsoft_onedrive_needed_at_startup.pdfIn PDF document text
    • https://cdn.sqhk.co/xujifomevesa/ihCLjeg/99316134064.pdfIn PDF document text
    • http://bloodcraft.online/transport_coordinator_job_interview_questions_and_answersc58fk.pdfIn PDF document text
    • http://simcars.ru/princeton_review_cracking_the_gmatm2l5h.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://judiserod.onlinewebshop.net/carson_dellosa_math_interactive_notebook.pdfIn PDF document text
    • https://b724dda4-e2e0-47c5-811c-ae3b7273578b.filesusr.com/ugd/a1e5ee_8a3a5c0f8fac4a819ef8084c01b6e001.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/liwafo/transaction_isolation_level_serializable_performance.pdfIn PDF document text
    • https://740e8036-3174-4dac-ae20-9eee1cd11a0a.filesusr.com/ugd/0f1c31_ff0c1167d2ef4425aa449f78bee5bc9e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zidenigad/bowitevozafuboluk.pdfIn PDF document text
    • https://71b4061d-0fbe-47a8-a671-08758978b022.filesusr.com/ugd/0216f2_bf1accd77fa74da0ba678178ff77a2d5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fezenur/fivasivoludixu.pdfIn PDF document text
    • https://9e730ba1-499c-413e-9a09-8a81f8121270.filesusr.com/ugd/0a0016_2691d360d67746fe99cf416cb2147e47.pdf?index=trueIn PDF document text
    • https://fd0ef26f-7b8f-4c91-b3b2-19f7ec93487a.filesusr.com/ugd/4174bf_f0f3120b98b24a3cb1c293f9b0c4e55f.pdf?index=trueIn 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_off0000ef14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF14 5728 bytes
SHA-256: f2a7bd47f2e8ceb7d8ecb689dbd192dbb35713e433d1633e7374d170438f943b
font_01_sfnt_off00010297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10297 11300 bytes
SHA-256: 78979c12b4c5390515467028c5522b568812f8b219288c106b720b2aee93edfb

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