Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2da12cfaada0210…

MALICIOUS

PDF

78.7 KB Created: 2021-02-21 07:10:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 66f934bfa7b98bdad6fe600f705752da SHA-1: dce840fd5828d19ac12b4a8bebfc2e9321f4ea0d SHA-256: c2da12cfaada0210964607f3e7d5fda16d26fae2b22708dc5394b1cfe399c538
136 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it's a PDF with an external URI and a lure for a password-protected archive. The embedded URL and the nature of the heuristics suggest the document is designed to trick the user into downloading a secondary malicious payload, likely a phishing or trojanized file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://jottigo.ru/123?utm_term=warehouse+safety+training+presentation PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444366/normal_5fe8914e7f460.pdfIn PDF document text
    • https://cdn.sqhk.co/leburogutu/ghBWXqO/start_up_k_drama_recap.pdfIn PDF document text
    • https://cdn.sqhk.co/xejadukoxeta/1Cjdgdp/god_of_stickman_3_hack_full.pdfIn PDF document text
    • https://cdn.sqhk.co/joxesinejag/gYkgdhb/86591183622.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460461/normal_6026d6c6eb49f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427529/normal_60224fa02f7bf.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
    • http://jotikovan.rf.gd/71326855969.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/arturia_minilab_mk2_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/sentence_fluency_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/66993933299.pdfIn PDF document text
    • http://gagoxapedako.epizy.com/vue_js_cheat_sheet.pdfIn PDF document text
    • http://firuxafuxu.rf.gd/97898317150.pdfIn PDF document text
    • http://dixuzudes.epizy.com/dlink_dir-868l_admin_password_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/guwalopegi.pdfIn PDF document text
    • http://dezezefisimel.rf.gd/articulatory_phonetics.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/papaxefebafetonujipizoko.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/doom_steam_size.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/query_google_sheets_label.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e93d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93D 5128 bytes
SHA-256: 85a01f6ddd5da442214f6914d621bd03940fc2d065be29c5339c467212e01cdf
font_01_sfnt_off0000fabf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFABF 10620 bytes
SHA-256: 627062a5e4386898dcee0bf8ed34657141affeedfd331a6043648481f46bf329
font_02_sfnt_off00011ed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED7 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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