Malicious PDF — malware analysis report

Static analysis result for SHA-256 f60a11b24cd8942c…

MALICIOUS

PDF

92.4 KB Created: 2021-02-07 19:52:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 830ad0daec0b1c8a699235ba820c9a19 SHA-1: a0f7e307fb16046e64ee8631274234dbb481771a SHA-256: f60a11b24cd8942c1ac9e4163fe2a1c4a738a222438ff8aa230d5eefa792314b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://maypoin.ru/aws?utm_term=eliciting+performance+%25E4%25B8%25AD%25E6%2596%2587 PDF link annotation
    • http://kusadelopo.iblogger.org/best_absorbed_form_of_iron_supplement.pdfIn PDF document text
    • https://cdn.sqhk.co/segevenujuka/aTaXYWN/monster_truck_games_online_free_no_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nixibaraje/ghVDN4h/shell_clubsmart_karte_app.pdfIn PDF document text
    • https://cdn.sqhk.co/nuwezomu/hKb7Fih/pulse_secure_not_connecting_mac.pdfIn PDF document text
    • http://sun-italy.space/australian_catholic_super_withdrawal_formhz0n1.pdfIn PDF document text
    • https://cdn.sqhk.co/lakuxezaj/hjieiht/auto_press_keyboard_for_roblox.pdfIn PDF document text
    • http://devlp.club/fawuxa022ql.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://zodazuwofapodu.epizy.com/minoxidil_beard_transformation.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/dibusitufakizudekunovotov.pdfIn PDF document text
    • http://juripijesem.rf.gd/tubonobitezar.pdfIn PDF document text
    • http://bameromaxaw.epizy.com/printable_brush_lettering_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/casio_watch_manual_3240.pdfIn PDF document text
    • http://petilawunabebi.epizy.com/cnn_headline_news_reporters.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/memulupuwofi.pdfIn PDF document text
    • http://luvojidepezepag.epizy.com/apowersoft_review.pdfIn PDF document text
    • http://lulevewutowa.epizy.com/rezinanunivezorajiged.pdfIn PDF document text
    • http://wilixafex.epizy.com/87919059858.pdfIn PDF document text
    • http://gokojap.epizy.com/genovaxoje.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001018c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018C 5512 bytes
SHA-256: 467a8cd76d173ec4d6b570a7914505a90e7398b617df890ea7592e5e4bd4e2e6
font_01_sfnt_off00011403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11403 3112 bytes
SHA-256: 96564aba911c042e1bbadff057d0b7705c7b68644d008025542afadf88f6d946
font_02_sfnt_off00011f08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F08 4904 bytes
SHA-256: 3678c74054cad062fd1bbcce4ba15c79be7fc9bb815b8b459adeeb80113b2ff0
font_03_sfnt_off00012f90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F90 10424 bytes
SHA-256: 1efd5f48a9fbcfc8e8711b430c32264996a86b56720640b3081613c79d16b1c7
font_04_sfnt_off00015354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15354 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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