Malicious PDF — malware analysis report

Static analysis result for SHA-256 c59d3e0730f34077…

MALICIOUS

PDF

97.5 KB Created: 2021-05-15 06:20:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3d9bdbb077e782080a995c983b62817 SHA-1: 526a1209a197e650ef1595031ad89fda72224faf SHA-256: c59d3e0730f34077064b32a7c4588da953dee33474bacd9748f6f4bac4ad6a3f
104 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that leads to a phishing domain, disguised as a guide for crocheting a baby hat. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=how+to+crochet+a+baby+boy+hat+0-3+months
    • http://vobalemujumojak.mywebcommunity.org/taziwizevipiduruzu.pdf
    • http://betmoy56.com/8879419887060lak.pdf
    • http://xedijama.getenjoyment.net/tuzebev.pdf
    • http://sugalomiwuto.getenjoyment.net/gekefajuwurimofex.pdf
    • http://itfamily.pro/poulan_p3314_carb_diagramdk4pq.pdf
    • http://com-signto5.xyz/tabifopawadumokofowijig5yr8.pdf
    • http://dikagowoxi.sportsontheweb.net/39548358472.pdf
    • http://liolika-rsya.ru/linux_distro_for_android_devices4fbgc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/piwupevivotixi/tusepupafelegub.pdf
    • https://uploads.strikinglycdn.com/files/2334aff5-7c03-4bcd-8bd3-80f98ce21243/how_to_set_the_temperature_on_a_frigidaire_mini_fridge.pdf
    • https://s3.amazonaws.com/dezajok/fariwelojijidisetig.pdf
    • https://uploads.strikinglycdn.com/files/30b01355-e8a3-45e4-9127-0f8ba3d9e327/gre_test_dates_2020_in_ghana.pdf
    • https://s3.amazonaws.com/takateg/air_conditioning_company_profile_format.pdf
    • https://uploads.strikinglycdn.com/files/412d6e36-f286-4fa5-8858-58cbb7eaa87f/essentials_of_statistics_for_the_behavioral_sciences.pdf
    • https://s3.amazonaws.com/norozovijalu/aqa_a_level_chemistry_notes.pdf
    • https://uploads.strikinglycdn.com/files/8df74ffc-9450-405c-b23e-5122ef464f8d/what_are_some_examples_of_exaggeration.pdf
    • http://lajirobodogew.epizy.com/business_plan_cover_page.pdf
    • https://s3.amazonaws.com/belopudevuzuza/what_is_meant_by_half_life_of_a_radioactive_isotope.pdf
    • http://ladugokifuwub.rf.gd/tridiagonal_matrix_algorithm.pdf
    • http://betemeparax.rf.gd/97690173859.pdf
    • http://rodedewezijore.atwebpages.com/how_to_mix_paint_4-1-1.pdf
    • https://uploads.strikinglycdn.com/files/306b99dd-40fb-4bdb-9ca6-9c0b65cabd34/13699223102.pdf
    • http://jagupawef.rf.gd/baxter_furniture_catalogue.pdf
    • https://uploads.strikinglycdn.com/files/7ec38a32-d05a-4382-999e-1f893dc04fad/34699038831.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013e9b.bin
61cf452a86abcf863ab392cc02b2b159a92ca3a402facc222fd96acfea38600a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13E9B 5640 bytes
font_01_sfnt_off000151b7.bin
18f4b77f0b4c65f9477befdd20e7879f041c5903b63356e5c54214fcc36a7d6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x151B7 10824 bytes

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