Malicious PDF — malware analysis report

Static analysis result for SHA-256 f46e7eb42b2e8bdf…

MALICIOUS

PDF

195.1 KB Created: 2021-03-18 01:04:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: b4bd6f53a04a5c0d9ee69c7d76bcca79 SHA-1: 6752195e1154a9a1521c3493b59dccf4d3386b81 SHA-256: f46e7eb42b2e8bdf051fe777037d34dea5428a944762e6be9631c7ca0086db06
104 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'midufefew.ru' suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains keywords related to downloads and urgency, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://midufefew.ru/award?keyword=bass+guitar+tabs+pdf+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375076/normal_602aa322797b5.pdfIn PDF document text
    • https://cdn.sqhk.co/kogujipubap/fSoMeie/42050961882.pdfIn PDF document text
    • https://cdn.sqhk.co/bipozipo/Yjigegc/minecraft_java_edition_servers_1._16.pdfIn PDF document text
    • https://cdn.sqhk.co/pufuxogife/ie00wge/nakuf.pdfIn PDF document text
    • https://cdn.sqhk.co/tusifefovozu/mhdejLO/singing_river_electric_pascagoula_mississippi.pdfIn PDF document text
    • https://cdn.sqhk.co/wevujawej/jd2uhbq/cheat_legend_of_blades_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368998/normal_5fc944e95c5ea.pdfIn PDF document text
    • https://cdn.sqhk.co/moturalogupe/aijnghd/60758471731.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/hgjiihb/63539406846.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419218/normal_604a9d607f232.pdfIn PDF document text
    • https://cdn.sqhk.co/zimidenex/jdibFnw/ps4_vr_lens_cleaning.pdfIn PDF document text
    • https://cdn.sqhk.co/daviwiloma/ji9pPif/6102842412.pdfIn PDF document text
    • https://cdn.sqhk.co/zimuvipejo/ggThfLs/all_hallows_school_uniform_shop.pdfIn PDF document text
    • https://cdn.sqhk.co/jinubodilev/xtgevhd/endocrine_society_pcos_guidelines.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445333/normal_60205f4e74afd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pirosisob/how_to_share_page_on_facebook_story.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f372c7e9-709f-494e-885e-e6a7314858c8/2012_dodge_avenger_v6_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/978336cc-87eb-40e1-b5ab-e12004e1ba13/82399850320.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/fibavanibok.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_off0002c5ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C5AE 5492 bytes
SHA-256: d07e5d448f1cbf7902b614952f65ffd7f9570f876c0c8d7618b9726141dce569
font_01_sfnt_off0002d877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D877 11380 bytes
SHA-256: ff26dda39ea60c68b8f53c34021755f141a46a1fe03901dddc20f36745f29d38

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