Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eb4b292a57317f4…

MALICIOUS

PDF

76.9 KB Created: 2021-03-13 17:53:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5fd3cff45bc8e0f44e8d26fffaa78700 SHA-1: 5bf2333f7a18ddc08b587568564a5a5dd75f2127 SHA-256: 9eb4b292a57317f42a1ff090cb91b4d9607dc4a411958b1d6d56ffb82257ac44
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, likely serving as a lure for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to malicious content, potentially exploiting PDF vulnerabilities or employing social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://bologen.ru/award?keyword=annotate+pdf+mac+preview
    • https://cdn.sqhk.co/vakolitakap/aWjhrgw/17848269967.pdf
    • https://xasigusuvenazuj.weebly.com/uploads/1/3/0/7/130739755/ladewaz.pdf
    • https://cdn.sqhk.co/delopomixaba/hMjjQgd/revenge_of_sultans_troop_guide.pdf
    • https://nedamekiwuj.weebly.com/uploads/1/3/1/3/131379605/givuvo-desip.pdf
    • https://paruvinuj.weebly.com/uploads/1/3/5/9/135970142/1689454.pdf
    • https://bezumovepefare.weebly.com/uploads/1/3/5/3/135337037/vufex.pdf
    • https://cdn.sqhk.co/mekibekowufe/c9fAkYi/combat_flight_simulator_4_requisitos.pdf
    • https://static.s123-cdn-static.com/uploads/4459796/normal_6007e65f70fc3.pdf
    • https://cdn.sqhk.co/fagaxirupunu/hjUhiiq/27144551541.pdf
    • https://cdn-cms.f-static.net/uploads/4445745/normal_601395eeb5c8e.pdf
    • https://cdn.sqhk.co/jotapepikota/7m9Dvgc/toca_boca_hair_salon_3_free_download_apple.pdf
    • https://popetufuwude.weebly.com/uploads/1/3/1/4/131483025/6280964.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4b0bcf62-5d69-41f2-acb4-8ea54bc4580f/roman_numbers_worksheet_for_grade_5.pdf
    • https://uploads.strikinglycdn.com/files/68f9de40-2371-4e25-a494-6171795a1411/how_to_rate_your_language_skills.pdf
    • https://237a2310-9536-43ad-add1-fe73b840a51a.filesusr.com/ugd/8b319d_563411408f5443da828ebf271ad7360f.pdf?index=true
    • https://s3.amazonaws.com/lekizopiloref/2102925061.pdf
    • https://s3.amazonaws.com/vibuvomomuv/nightcore_music_player_apk.pdf
    • https://s3.amazonaws.com/jixeremipet/99233877363.pdf
    • https://uploads.strikinglycdn.com/files/036857e2-6747-486d-a434-2919b871c71b/where_can_i_drop_off_clothing_donation_near_me.pdf
    • https://1c54689f-8f60-44d8-8d81-b144d6ea8ada.filesusr.com/ugd/787b0a_8c0b679a074143c29e35a9b351e09841.pdf?index=true
    • https://s3.amazonaws.com/widuxade/how_to_read_books_ed_from_amazon.pdf
    • https://uploads.strikinglycdn.com/files/826d3779-23b1-4797-8abf-14f2f4d3064a/lakasawa.pdf
    • https://s3.amazonaws.com/gimisorixosu/95186112386.pdf
    • https://uploads.strikinglycdn.com/files/9520d951-eccb-4608-8d56-f0f7af09c915/nuwutuwekip.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_off0000f02c.bin
4dc27d818d25ddb36a167f9ff49b5cf8d7b2bd22469f94d00c6f58ca55b2496b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF02C 5232 bytes
font_01_sfnt_off000101fc.bin
a1409412ac8cd1ce1d3bfe8998cc9587bcd6d266c5f2d6aedcd0cc1702cc1f74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101FC 10708 bytes

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