Malicious PDF — malware analysis report

Static analysis result for SHA-256 c05d04ed3f00c9b5…

MALICIOUS

PDF

112.0 KB Created: 2021-03-22 14:19:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9e832d349ca9a665aeee75a9ed8f0b0d SHA-1: 7e968ea8ed527da59e7ffd30493f634c4520a8e0 SHA-256: c05d04ed3f00c9b581df69395d5fda50f9c6c9247c3e6fbb25b68d796990741a
104 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains an embedded URL pointing to 'https://jacksth.ru/strik?utm_term=ipad+mini+2019+specs+ram', which is likely part of a phishing campaign. The heuristic 'SE_URGENCY_LURE' suggests the document attempts to create a sense of urgency, further supporting a phishing attack pattern.

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://jacksth.ru/strik?utm_term=ipad+mini+2019+specs+ram PDF link annotation
    • http://jewogipuwivi.medianewsonline.com/speak_now_3_vk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495055/normal_602b85456bddc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422884/normal_603514d3ddf1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489599/normal_5fd32d48e1608.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_60540812249ac.pdfIn PDF document text
    • http://kitafoged.medianewsonline.com/how_to_change_ott_light_bulb.pdfIn PDF document text
    • https://cdn.sqhk.co/goduwonon/8KcbidJ/artrage_draw_paint_create_1._3._15.pdfIn PDF document text
    • https://cdn.sqhk.co/nugopanage/gehbL9B/8584601923.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502464/normal_601bb116bdb62.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385437/normal_5fcf3e361fd14.pdfIn PDF document text
    • https://cdn.sqhk.co/nasanoroge/jcuJjin/viponokaxovagunavag.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451363/normal_5fdef0b3f3dc1.pdfIn PDF document text
    • https://cdn.sqhk.co/luwesefizi/MhjIigU/99502298129.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/61ef8029-683a-4479-8cfd-3268cfd70571/ryobi_ss26_weed_eater_wont_stay_running.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/32592052295.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4506ddb5-4cc0-4bcc-870d-f05070baf873/24250333046.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4284862-5a57-40b3-85e7-6501e4486bf7/why_my_frigidaire_microwave_stopped_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d16b61b-d4ad-4342-bf7d-8ed8e685aa77/zozuzitogonubewubin.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/how_to_set_timex_time_machine_watch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebccfe8f-cdd3-442e-9688-fb2e431cae88/ross_stores_open_mesa_az.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_off0001761f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1761F 5604 bytes
SHA-256: 8370bdc7d514796cda693f08746331f74dd1d921f23bf0f3610a7a64ba7955ac
font_01_sfnt_off00018919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18919 12080 bytes
SHA-256: ef4b1fcf6371dca8f530464d9760cc46352cca4d1f34f446f120f39d8d2f10af

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