Malicious PDF — malware analysis report

Static analysis result for SHA-256 f33125b65594e1bf…

MALICIOUS

PDF

78.0 KB Created: 2021-02-01 08:03:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: a0a8cf29d4aceb0caf68cff00aedb50d SHA-1: f64144e9d5c07ae2322339b9429e4fbfebd0791f SHA-256: f33125b65594e1bf9b4c572686633df40440863f501535f56e35619c63823c8f
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded link suggest it is designed to lead the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/123?utm_term=cause+and+effect+topics+ielts In PDF document text
    • http://mafuditovu.iblogger.org/fuwewinivenavow.pdfIn PDF document text
    • http://lisifakus.66ghz.com/44036085268.pdfIn PDF document text
    • http://fakaripeti.xyz/panefapevmrwax.pdfIn PDF document text
    • http://juzajikadig.22web.org/94457652615.pdfIn PDF document text
    • http://english-10.site/bolumasaweloxqkgll.pdfIn PDF document text
    • http://jevopapivixepe.iblogger.org/xuvelefagevuxokusemalawu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474985/normal_5fd8af5c7a7e2.pdfIn PDF document text
    • http://duvazejezirofid.22web.org/private_facebook_videos_to_computer.pdfIn PDF document text
    • http://hook-up.fun/alldata_en_espaol_fullncfz9.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://s3.amazonaws.com/nedijowewoded/voot_app_from_google_play_store.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/rovunefegorovudilidamige.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/arquitectura_griega_antigua.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/negulu.pdfIn PDF document text
    • http://fokozagizek.rf.gd/93181578687.pdfIn PDF document text
    • http://susodiwur.epizy.com/9912206698.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/beautiful_in_white_remix_free.pdfIn PDF document text
    • http://nebopepebog.rf.gd/amend_text_online.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/galekuf.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_off0000e7dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DD 4960 bytes
SHA-256: fc0365df9497d582700dd0c60f12bfdc4ac7a25f76a5fa1aa1611093e92d34b7
font_01_sfnt_off0000f8cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CF 10576 bytes
SHA-256: 34c1aa6af09e0ef83f939bfcca42a3ec7af8297e5cafa403d76e6ba90a456fd4
font_02_sfnt_off00011c87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C87 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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