Malicious PDF — malware analysis report

Static analysis result for SHA-256 79ef1ace80594218…

MALICIOUS

PDF

80.6 KB Created: 2021-06-02 19:49:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4de7a35bd8042ab01dd03f6d413d80ca SHA-1: 822f6a35256283b9da7dae3c8cdba43b73bc9fa4 SHA-256: 79ef1ace80594218137e08faff2bc2a37950dbd10fa054ac1c3bf3918afb5ac9
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://chcial.ru/pbw?utm_term=arithmetic+progression+worksheet+class+10+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424672/normal_60198a8a8a4ef.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4370265/normal_60b327245170a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365599/normal_601a0888dcffc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382966/normal_6013c87e12e96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450043/normal_6058287604683.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376357/normal_60492c38f305d.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4450727/normal_60aff92f386af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370068/normal_60571ad775a5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480423/normal_6017b2ab3507b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380857/normal_6056600b74b9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486220/normal_6027c9ea73c37.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454679/normal_60050ac583ba6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499622/normal_5ff69f0a12fb4.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/b07ceb04-ae63-4b47-b66f-ba7ae212ecb5/16085674729.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c04109e5-7eea-4901-819c-93bf3f45eb20/sugufakeme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b6a998d-a498-4f83-a149-de5fe6fcfc3c/best_new_th13_war_base_2021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40c9b22c-a32c-451f-b945-f62a9dbb581c/56493110963.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5af03299-1ce3-46c7-b814-29d17e2d6cd5/dodge_ram_repair_shops_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c68a372-7503-4d7c-b207-c4cb59705146/lexique_juridique_franais_arabe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01ed230e-84ec-4415-a7e0-e8ed98fb00ec/mizuripabezobedavasofuvo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15deaee5-7a3a-4176-b86a-228d0de35e6d/atlas_de_geografia_humana_de_espaa.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e28f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28F 5908 bytes
SHA-256: 5d7baf1eb87fd5ccbbc7146987e2f5feae611f9e1ad578e3aedebc73872eb1f3
font_01_sfnt_off0000f6a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A1 11896 bytes
SHA-256: 9e4d5132c276524c9b6c5ee2f10b8a8e2c718d8619d72edc10b29a1913fa31b7
font_02_sfnt_off00011ef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF4 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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