Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e71faedfa53e1af…

MALICIOUS

PDF

76.1 KB Created: 2021-04-03 03:51:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbf5f299b6f25eb0a51b903e6d025168 SHA-1: 0d52b85fcf8c5848244f2afc1e6c4177b8423b41 SHA-256: 5e71faedfa53e1af99e637f7eb604a723491725b6f243fdac8c5b966702e8b6d
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely intended to trick the user into visiting a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the PDF heuristics suggest an attempt to deliver a malicious payload or redirect the user to a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/wix?keyword=how+to+eat+fried+worms+chapter+questions
    • http://zefonurogize.22web.org/pm_awas_yojana_rural_form.pdf
    • http://patewukezevo.iblogger.org/buximuvofenuxudi.pdf
    • http://rebelliona.online/strengths_and_weaknesses_questions_and_answers_interviewk6emo.pdf
    • https://cdn-cms.f-static.net/uploads/4420025/normal_601b4914c8b9c.pdf
    • https://static.s123-cdn-static.com/uploads/4457577/normal_60097c202bd70.pdf
    • https://cdn-cms.f-static.net/uploads/4368985/normal_6067a1156161f.pdf
    • https://cdn-cms.f-static.net/uploads/4469640/normal_600dd36c7c6ff.pdf
    • https://static.s123-cdn-static.com/uploads/4465255/normal_6001d935411fa.pdf
    • https://cdn-cms.f-static.net/uploads/4464522/normal_605360ed4f0d1.pdf
    • http://1offpark.xyz/nemasifafobeduremafugavah8e.pdf
    • http://shop-kid-toys.online/the_new_gate_schnee_and_shinfmkbv.pdf
    • http://0fruits.space/lafuwoweniw7k6td.pdf
    • https://cdn-cms.f-static.net/uploads/4469105/normal_6019594550f16.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/55aace75-52e3-4400-9a42-fe3b80ec0c17/what_does_intellisense_mean_on_omron_blood_pressure_monitor.pdf
    • http://setuvufijub.epizy.com/bevagotipapinuja.pdf
    • https://uploads.strikinglycdn.com/files/615a5c59-0757-4b72-8818-219f0ebd1e02/rogarirokugowilavizusanop.pdf
    • https://uploads.strikinglycdn.com/files/3718cc66-9ac6-4954-96a7-b1e767a9c554/cuentos_sobre_mitologia_griega_para_nios.pdf
    • https://uploads.strikinglycdn.com/files/d11aa439-bec6-40c0-ae56-93649841914b/how_many_calories_in_5_dunkin_donuts_munchkins.pdf
    • http://fefomopopokelo.epizy.com/capparis_cartilaginea.pdf
    • https://uploads.strikinglycdn.com/files/7d0b97f6-c96b-4a75-bc6c-8dfdb1295f30/how_much_do_cortisone_shots_cost_for_dogs.pdf
    • https://uploads.strikinglycdn.com/files/efb98315-dc5d-4372-9563-9233ebdb9d57/how_to_use_rowenta_steamer_crease_attachment.pdf
    • https://uploads.strikinglycdn.com/files/8e6fc9a3-a826-4c77-aac4-c058e6959b5d/powerback_gt5250_generator_manual.pdf
    • http://depezure.epizy.com/43129555616.pdf
    • https://uploads.strikinglycdn.com/files/76d46416-6a49-4b15-aa8c-04af66968881/difference_between_grep_sed_and_awk_in_unix.pdf
    • https://uploads.strikinglycdn.com/files/91973377-db87-495b-affe-3ba299eaf1ad/rigipodonovon.pdf
    • https://uploads.strikinglycdn.com/files/25e8454f-95ba-4973-9f05-69ca0dfa1c13/25746346363.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_off0000e84a.bin
5f065bae70c06d4c0b900a5c55bcc40103ab29a6f2d2f6dda1a2114179bb2cd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE84A 5540 bytes
font_01_sfnt_off0000fb09.bin
35c406df9d2f79d7ada67fae523ef993bb4e987d1fa59605300fb2310042916d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB09 11160 bytes

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