Malicious PDF — malware analysis report

Static analysis result for SHA-256 79c65bd248a5ba8a…

MALICIOUS

PDF

78.0 KB Created: 2021-06-09 16:31:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bba8b868b768a6655b17876843e6c161 SHA-1: 5096736c8ec8337ddd2dc8eb30ab83180f82c416 SHA-256: 79c65bd248a5ba8ad4719ec5b7ec79c53a971b957e8f9c9605631b0f7b14c9d0
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URI that leads to a URL disguised as a free book download. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or malware distribution. The ML classifier and ClamAV detection strongly support the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://oniceh.ru/pbw?utm_term=mannan+magal+book+pdf+free+download
    • https://cdn-cms.f-static.net/uploads/4474999/normal_6028e2ba55310.pdf
    • https://cdn-cms.f-static.net/uploads/4412568/normal_600cf4e63b253.pdf
    • https://cdn-cms.f-static.net/uploads/4527042/normal_60bfa45b7de17.pdf
    • https://cdn-cms.f-static.net/uploads/4481166/normal_60b93c34f079f.pdf
    • https://cdn-cms.f-static.net/uploads/4445337/normal_605efb26408ce.pdf
    • https://cdn-cms.f-static.net/uploads/4496404/normal_6056d542bd3e3.pdf
    • https://cdn-cms.f-static.net/uploads/4447253/normal_5fd1849911739.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/aaeaf9ee-ee50-41b7-aa01-6b973506d77e/skyrim_where_can_i_get_a_silver_sword.pdf
    • http://pesivop.pbworks.com/w/file/fetch/144634545/canon_eos_camera_info_v1_2_for_mac_download.pdf
    • https://uploads.strikinglycdn.com/files/2a326e5d-f06a-4c64-a666-6bde84938f12/practice_permit_test_ma_2015_online.pdf
    • http://zufumegi.pbworks.com/f/zarizazajaroradajave.pdf
    • http://nodisakajew.pbworks.com/w/file/fetch/144773895/server_minecraft_pe_free.pdf
    • http://niluputevi.pbworks.com/f/canoscan_lide_25_twain_driver_windows_7_64_bit.pdf
    • http://mofarires.pbworks.com/f/retixemefutumexurutefa.pdf
    • http://visetululiv.pbworks.com/w/file/fetch/144415359/4963700852.pdf
    • https://uploads.strikinglycdn.com/files/b92750c7-4136-40ae-8a4c-bd587fae5e18/kivalis.pdf
    • http://wisarazed.pbworks.com/w/file/fetch/144867531/65197575734.pdf
    • https://uploads.strikinglycdn.com/files/d9e6c027-4785-4f13-8203-1ad6b60e7d65/minecraft_pocket_edition_son_srm_cepte_net.pdf
    • http://favixose.pbworks.com/f/set_active_worksheet_excel.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_off0000f3aa.bin
8278789796818931c78005c23a07469de02c9db4b8259af4ef2fa6d75c439e40
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AA 5484 bytes
font_01_sfnt_off0001065c.bin
07f3ea52e2aaf99732374b17897b80b1c517bcaebcd8eeccca5039037900cb13
pdf-font-stream PDF embedded font (sfnt) at offset 0x1065C 10928 bytes