Malicious PDF — malware analysis report

Static analysis result for SHA-256 4730cfe895b7fe92…

MALICIOUS

PDF

72.2 KB Created: 2021-05-09 08:06:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 017a3cd571d63c5e3a2078b966a563fd SHA-1: 9145442e825c33bf7c7db739dd12ff2570e1df25 SHA-256: 4730cfe895b7fe92e97a2101af564e9c5d4a83caa0b8957917487a8063f7b9a6
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'fokemale.ru', which is likely used to host a malicious payload or phishing page. The document body is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create PDFs from web content, potentially masking the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://fokemale.ru/strik?utm_term=yaesu+vx-6r+battery+life PDF link annotation
    • http://saniwigudovo.scienceontheweb.net/control_system_engineering_by_norman_nise_solution_manual_7th_edition.pdfIn PDF document text
    • http://nelolizavulejuj.medianewsonline.com/functionalism_anthropology.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/61efad36-24c3-426b-84e8-e4fb60b91f0c/27489164432.pdfIn PDF document text
    • http://nepokuwaporot.rf.gd/wusuzalunalukeremul.pdfIn PDF document text
    • http://gitexilamivori.epizy.com/37944438603.pdfIn PDF document text
    • http://nedugone.epizy.com/14095465280.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/264ac9f7-2f51-4a56-b053-3db56626de2e/jufapajokejeweduwan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5047605b-860d-446b-8d65-80544f2565ae/advantages_of_non_destructive_testing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59d46302-c8dd-42ad-879a-846f1a5ec2ae/el_coran_en_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa734715-484c-4757-8221-c1597cbb2055/sikajejagek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2745220-6d77-48df-a535-50dcc272d7d4/13692781654.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b522376c-4870-4be5-81c5-a330666fc12e/how_to_draw_a_scale_bar_architecture.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bc31186-3b97-4cbb-a73e-c89dcad395d5/evan_moor_daily_reading_comprehension_grade_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18bf345c-ecbc-47fa-bc99-2d2ae2229ca5/97887946326.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1a54f3c-6310-4c9a-88bb-6156c84b61cd/martial_power_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b3afc3b-1e53-4671-b9af-3807c3b60108/how_to_ignore_friends_in_lol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98edef9e-7471-4dca-bbbb-177379ca4f83/93973939120.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f6308b3-7b1f-4c3c-8c52-f0121683f960/progressive_supranuclear_palsy_pronunciation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f332f65-936b-4185-9b0a-73a2371ac455/real_estate_agent_representative_certificate_melbourne.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84730813-8899-41c9-add2-b072d7464d8a/format_essay_apa_style.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5e1300b-35c2-44e7-a074-e8416ef2257e/integral_cos2_x_sin_2x_dx.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b401308f-7d53-47e9-bce5-ac85bae1ac6a/how_fast_is_a_police_charger.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_off0000dc38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC38 5276 bytes
SHA-256: eeaae3350daac3f9f0a5fe4d756b08c873465fd38161f380dbc061c35485e3c8
font_01_sfnt_off0000ee51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE51 11176 bytes
SHA-256: d32aed0ee43aab9b87f8803513333e6483a77c107a910ef95e5d29995652c37f

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