Malicious PDF — malware analysis report

Static analysis result for SHA-256 b10242ec93f1820b…

MALICIOUS

PDF

69.6 KB Created: 2021-02-16 00:10:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: db8ab0d311082946fee7a392645439e6 SHA-1: 5252c7697ecf6c5912017667a210669528dc8756 SHA-256: b10242ec93f1820becb8e4ffb4974927deda2f9f5b6d1222500b7a95d35d71c7
162 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL and the 'Urgency / deadline lure' heuristic suggest the document is designed to trick the user into clicking the link, likely leading to a phishing page or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/strik?utm_term=what+does+an+autopsy+report+tell+you In PDF document text
    • https://cdn.sqhk.co/xakelafu/IgitQuC/pokemon_dark_rising_tm_cheats_codes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402488/normal_600966f322d83.pdfIn PDF document text
    • http://popularchoice.space/1000_palabras_basicas_en_ingleslxthl.pdfIn PDF document text
    • http://keep-travel.com/teacher_guide_grade_9_physicsfl24l.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459774/normal_5fffd1e66045e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375909/normal_6028fb8f7bcea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391314/normal_5ff199f8efe35.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375889/normal_5ff46469c030d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459323/normal_602631108e9c5.pdfIn PDF document text
    • https://cdn.sqhk.co/dutaxato/fOrb0Cy/jozeko.pdfIn PDF document text
    • http://begemot.space/mabexataxivewowijuxurano7jed6.pdfIn PDF document text
    • http://ogranicbio.fun/colors_of_the_windzcj6r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366325/normal_6027cc14dadbb.pdfIn PDF document text
    • https://cdn.sqhk.co/detazido/7bhh0gg/3414230887.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/zuguvoxoki/zixikumimazevitemisumuwex.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/nunikosak.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/95867427733.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/3018608769.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_off0000d4af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AF 5164 bytes
SHA-256: a24f3bf063fd9b2342307eda61abe1a109d6b65b772e320dc4532d305e66847e
font_01_sfnt_off0000e64c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64C 10276 bytes
SHA-256: 2a91ddc73548e75ea2e924d4e1a54f0f306167682fbeca937b4350cd110c5df4

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