Malicious PDF — malware analysis report

Static analysis result for SHA-256 f33cf641f8208760…

MALICIOUS

PDF

75.8 KB Created: 2021-02-19 03:45:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: fdeb46a096400c5c21ecb7106afe8f53 SHA-1: 42f482c72525500d0a30d47b335a70bad677c79c SHA-256: f33cf641f8208760780ec01110d52b51c50af26dd425ab3a6b4f3347437a5d3b
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. The embedded URL is likely intended to lead the user to a second-stage payload or a phishing page.

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
  • 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/wix?keyword=carta+perdoname+te+falle In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417308/normal_5fe982ea462c1.pdfIn PDF document text
    • http://svoytrylend.xyz/ibni_kesir_tefsiri15bw6.pdfIn PDF document text
    • http://golosa-spasibo.ru/70113066860f7k6p.pdfIn PDF document text
    • http://lovefoxesi.iblogger.org/4963826997.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455672/normal_5fe3ad2b12575.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420025/normal_5fed9438a235e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391925/normal_600476595fdb6.pdfIn PDF document text
    • http://esagafow.fun/cities_skylines_ps4_modsf5s56.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447906/normal_5ff4704bb42d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368964/normal_5ff3fcdf8d616.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501495/normal_60021f0bdb910.pdfIn PDF document text
    • http://ig-copyrightnotice.com/61497744145py6f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368222/normal_5ff41f39d75d0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/69570697743.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/fishing_report_dauphin_island_alabama.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/losibadobebevakosesomape.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/kawesatuxusagimifuzurux.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/botete.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/attila_total_war_strategy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/93926010770.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF50 4916 bytes
SHA-256: cb13a17acd80c337c7b465fc6de43f66c2566b701661db5fc55e147a706b9ba1
font_01_sfnt_off0000fff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF2 10040 bytes
SHA-256: 5d0e3aed4e35f958fd2310b9095a3dcb8a1f846b8539b61c806a20f303a890fd

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