Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca5c34af192a8e98…

MALICIOUS

PDF

77.3 KB Created: 2021-03-17 04:27:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4fef9055744b18f346b18ef8fac4da7d SHA-1: 58a082d04814e0ec3311cf0f83a6b7de4e8d28b8 SHA-256: ca5c34af192a8e98933fa31ce768f646c4cd30d09be52df101c188fef0211f2a
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://jottigo.ru/strik?utm_term=how+do+i+sign+into+classdojo PDF link annotation
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/a49aa5.pdfIn PDF document text
    • http://7lessons.space/volibalofalefumakafitidkqq8x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472760/normal_5fd1261c6fe7a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490274/normal_5fd04d8aed004.pdfIn PDF document text
    • http://lighterusb24.site/xeluluzopavuzokfsfd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368506/normal_6024174d35c99.pdfIn PDF document text
    • https://garugufalavul.weebly.com/uploads/1/3/4/5/134507034/02d63c.pdfIn PDF document text
    • http://blancop.xyz/canon_pixma_922_printing_blank_pagesat9ah.pdfIn PDF document text
    • http://profit-makers.club/new_zealand_reinforced_concrete_design_handbook1scdp.pdfIn PDF document text
    • http://natfreshik.fun/how_to_write_a_simple_song_lyricsv64wb.pdfIn PDF document text
    • http://snegny.com/88811128666smeja.pdfIn PDF document text
    • https://zamosokajuzosa.weebly.com/uploads/1/3/4/6/134651904/4170471.pdfIn PDF document text
    • http://thecet.xyz/femuxeb03lg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406213/normal_5fca94e057459.pdfIn PDF document text
    • http://redtea.space/67139173773o2ee.pdfIn PDF document text
    • http://salonapp.xyz/kirik_party_belageddu_video_song_hd7plgo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dimebuturerab.epizy.com/aggregate_planning_case_study.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/ridobabunumitivakudek.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/pifudazufa.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/omron_bp652_wrist_blood_pressure_monitor.pdfIn PDF document text
    • http://lujolugajejizog.epizy.com/best_vpn_app_for_android_china.pdfIn PDF document text
    • http://manutilo.epizy.com/portuguese_water_dog_grooming_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/41581479871.pdfIn PDF document text
    • http://wukosow.epizy.com/adblock_firefox_48_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/2331536401.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_off0000eeb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB4 5140 bytes
SHA-256: bb3fc64ca988e3a070e0b64544f2e28082c35f0897f19f33f09a778f8b7cb876
font_01_sfnt_off0001005d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005D 11640 bytes
SHA-256: 3fc290b79c1ee9c922face1f53e23acfa43451de723d85d1ed7751ae071d8cf4

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