Malicious PDF — malware analysis report

Static analysis result for SHA-256 401c530d2af303d4…

MALICIOUS

PDF

71.0 KB Created: 2021-05-31 04:07:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 271368caf961d3553cf58bb7b7f4275e SHA-1: d197817f6d6cf3eb53209f3074c63fb6ca006301 SHA-256: 401c530d2af303d4f54246422ca36c66f6949a260183f574821a4f7464aaddfb
96 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains an embedded URL pointing to a suspicious domain, likely intended for phishing or malware distribution. The document body, though heavily obfuscated, appears to contain metadata related to educational material, suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://nipisod.ru/strik?utm_term=national+geographic+learning+life+3+pdf
    • https://static.s123-cdn-static.com/uploads/4366668/normal_5fee451c8f7a8.pdf
    • https://cdn-cms.f-static.net/uploads/4410953/normal_6033d434a784a.pdf
    • https://cdn-cms.f-static.net/uploads/4460708/normal_6044bbc525c65.pdf
    • https://cdn-cms.f-static.net/uploads/4379241/normal_6047e65251429.pdf
    • https://static.s123-cdn-static.com/uploads/4443292/normal_5fdf588a95e84.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f06001b5-a62f-4352-9f3b-96fba46e0edf/computer_organization_and_architecture_online_course.pdf
    • https://uploads.strikinglycdn.com/files/8b0c0a91-5716-4f3f-9fba-8e4f3faed8d9/273108753.pdf
    • https://uploads.strikinglycdn.com/files/2fa6c524-5322-44d0-92d4-25965b62b834/14400840071.pdf
    • https://uploads.strikinglycdn.com/files/b935eafe-f625-4105-8223-00c36f73f3a2/ice_breakers_questions_for_meetings.pdf
    • https://uploads.strikinglycdn.com/files/def0a404-03b7-4557-96a3-91fda85cb226/what_is_a_fastidious_bacteria.pdf
    • https://uploads.strikinglycdn.com/files/cfcfc27c-6672-4343-b831-1898cfed6758/tajoxinu.pdf
    • https://uploads.strikinglycdn.com/files/51effc92-8a78-4859-86b9-d2a7864f6c22/english_conversation_17_anh_ngu_vips.pdf
    • https://uploads.strikinglycdn.com/files/3e2bc42a-3783-415a-a116-e17869fac3aa/weber_spirit_ii_e-310_gbs_bbq_cover.pdf
    • https://uploads.strikinglycdn.com/files/6bbeeaa9-f730-4108-918a-5ef9c417c00a/febomozusuzinovasavizasev.pdf
    • https://uploads.strikinglycdn.com/files/94619297-342a-4fcc-bc96-2404c31b0c4a/homelite_330_chainsaw_chain.pdf
    • https://uploads.strikinglycdn.com/files/e211feff-4919-44bb-b08e-0f11b3764084/letras_para_colorear_grandes_minusculas.pdf
    • https://uploads.strikinglycdn.com/files/557e5be4-d8e8-469e-9e35-cbefbda993e8/bizidumegubufipinu.pdf
    • https://uploads.strikinglycdn.com/files/69e6a615-ba91-49b2-bfa2-7f90ce4809d7/what_is_the_region_of_mesopotamia_known_for.pdf
    • https://uploads.strikinglycdn.com/files/821db467-8e3b-4bfb-9544-f5ac1f8f975e/art_of_seduction_summary.pdf
    • https://uploads.strikinglycdn.com/files/630295e0-8b1d-4778-826e-b9f5d7ad086b/sonupekulave.pdf
    • https://uploads.strikinglycdn.com/files/e13f3355-905a-4305-88ca-71d67b9539cc/28435238234.pdf
    • https://uploads.strikinglycdn.com/files/cce78848-6b8e-4bf1-926d-feac4e3db0aa/what_is_a_passing_score_on_the_cdl_test.pdf
    • https://uploads.strikinglycdn.com/files/d2fe7d0a-a7a3-4284-9eee-117786d3422b/fofixarugegopefitofef.pdf
    • https://uploads.strikinglycdn.com/files/c0e65234-2fa7-422d-b20b-db99de3f3387/duracell_ultra_automatic_battery_charger_0.8a_instructions.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_off0000d80a.bin
6df8e18992daa78b2879af27f0059c526c4b8c78bffaf2a541a5f7832cc3a9a2
pdf-font-stream PDF embedded font (sfnt) at offset 0xD80A 5372 bytes
font_01_sfnt_off0000ea58.bin
6b61363de80ca8ebee917bf731a58b8df4a09b75d4f57168f9b21dc8c8414f51
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA58 10612 bytes