Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb31ec500a3c1d57…

MALICIOUS

PDF

78.8 KB Created: 2021-06-08 21:59:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 95a8fc312eca4ddabdeafe22c314dcc2 SHA-1: 940579490fde9d675acc6ba766ddc9756f9ce085 SHA-256: fb31ec500a3c1d5727d926321c70906b4905f21c40889f84d9766af195eb882c
96 Risk Score

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 0.9991

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://philabc.ru/pbw?utm_term=sao+alicization+episode+2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380876/normal_60400b37ae8dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492555/normal_6018ab8f98c7c.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4446645/normal_60b3aeb29866d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379474/normal_603f1da3232fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453734/normal_601c748dbacab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387715/normal_5ff06d155e170.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373753/normal_600af8bd1a5c1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/50bd0391-2243-4bd4-9dc0-542eb66ea7a5/can_you_cite_to_unpublished_cases_in_federal_court.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05dfb7fb-37af-42e5-9713-f1ae6e009cb0/22019177238.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd7b41c0-300a-450d-9df9-6abdf15601a2/alfreds_basic_piano_library_lesson_book_bk_1a.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a7eaa68-0834-4b3b-a0ed-f831d6ab1f5a/marley_and_me_watch_online_free_hd.pdfIn PDF document text
    • http://fatakalewene.pbworks.com/f/nuwojokeboperujo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fab6d48-4a12-43b0-99e3-9b3ff1edcdb5/12348608608.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d92ef7c6-fb67-402b-86fd-deb65e1ef8cd/jalesivivezilanezudelew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3865bc31-fda5-41d3-b23b-5adb6f4a6f40/91885384616.pdfIn PDF document text
    • http://kokoxudalux.pbworks.com/w/file/fetch/144427833/90095514584.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4dddf11-8665-48ed-9d2e-73155c7ca022/what_is_a_periodized_training_program.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1d85812-fc17-42fc-a24b-3a86185fb7f6/65758825389.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c375095-1d9a-4f66-82a6-b31be127d77e/zojudunexepagomu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5338c99d-39bc-4da7-a6d8-b6770b3e7c76/what_is_chemosynthesis_easy_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da7bf772-ffe7-404d-a804-f83f734e461b/zosasalojumesilavemeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a1e9c39-c53a-4cdf-a3c4-7ce8c4cd49cb/us_army_field_band_jazz_ambassadors.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD944 4408 bytes
SHA-256: feb6f808417573d55754659d9e5f67a1ad5a35cc018112c34e03a638c9958949
font_01_sfnt_off0000e89f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89F 5044 bytes
SHA-256: 60e1ab09b6916f3503d02e2f5e4ab8c405d26860647df7175ddf3dbb62a4d83e
font_02_sfnt_off0000f9ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CA 11500 bytes
SHA-256: ca064f4e146cccf1bfd2dc2ed4ad932ee083cb03f956e9da96d9dfff1dd0c494
font_03_sfnt_off00011fa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA0 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71