Malicious PDF — malware analysis report

Static analysis result for SHA-256 262dbc94ec57b370…

MALICIOUS

PDF

88.3 KB Created: 2021-03-14 01:59:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 921fc224d81a1404a420abf2096f837f SHA-1: a6abd74ff4c6903cd0a1d371bb1f56c9a1424b18 SHA-256: 262dbc94ec57b370472ecd907a7eea4cf60491bf8602fbcb3873decad22fd127
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though partially corrupted, suggests a lure related to an 'answer key', aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/wix?keyword=patterns+of+evolution+worksheet+answer+key
    • https://luvoseguz.weebly.com/uploads/1/3/4/6/134665560/xupab.pdf
    • http://jusojixanona.getenjoyment.net/how_to_use_a_plot_diagram.pdf
    • https://cdn.sqhk.co/rolileduvof/cjwQibh/crescent_city_connection_jumper_2019.pdf
    • https://xorizugabe.weebly.com/uploads/1/3/1/3/131398100/webowebupevowe-mejasinakejif.pdf
    • https://cdn-cms.f-static.net/uploads/4485573/normal_602d8d4a73d95.pdf
    • https://nagagixibedixu.weebly.com/uploads/1/3/1/6/131606435/bogaxubuda.pdf
    • https://cdn.sqhk.co/susopavazane/icZoTgd/39850871691.pdf
    • https://cdn-cms.f-static.net/uploads/4393925/normal_600d7f2be8b10.pdf
    • https://cdn.sqhk.co/gojogefe/GidUigl/vigoxaladej.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0495685e-fc2b-4933-a132-c8cfed3412f2/is_there_going_to_be_a_michael_vey_book_8.pdf
    • https://s3.amazonaws.com/buponuwebi/financial_planning_report_example.pdf
    • https://s3.amazonaws.com/netinuwa/ldc_exam_paper_answer_key.pdf
    • https://uploads.strikinglycdn.com/files/0b037875-744a-4fa0-8b93-843364c9a004/87471291828.pdf
    • https://uploads.strikinglycdn.com/files/8393d946-ea7b-4e39-8169-57226ad82dbe/junixakubitexonerufapojo.pdf
    • http://davofunup.onlinewebshop.net/assiduidade_e_pontualidade_no_trabalho.pdf
    • https://uploads.strikinglycdn.com/files/28c641c0-0592-4f50-a65b-80f8735c3d87/13229878289.pdf
    • https://s3.amazonaws.com/kevava/54784379120.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104d8.bin
004ff4f0b619d659142a94d6990ca2950011471e288baecc828474cd0269bc87
pdf-font-stream PDF embedded font (sfnt) at offset 0x104D8 5176 bytes
font_01_sfnt_off00011689.bin
bc1760eca365afd8b1468187ec2008379de05129f7370192883aa82e5b1357db
pdf-font-stream PDF embedded font (sfnt) at offset 0x11689 11724 bytes
font_02_sfnt_off00013eb7.bin
8164b3083dbc10d302236c85d4902a3bb1399755f1b7623f6d0011557f3e8ead
pdf-font-stream PDF embedded font (sfnt) at offset 0x13EB7 16144 bytes