Malicious PDF — malware analysis report

Static analysis result for SHA-256 5116097bcbb5a243…

MALICIOUS

PDF

67.8 KB Created: 2021-01-07 07:39:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f447cc8bef633264692b97f3d2fc3dfc SHA-1: 9d8c1f87214c60c0e78835164fcceed97ea58cee SHA-256: 5116097bcbb5a243b84522617bb5f983887ff06b8ee72c44f091082f57bfe535
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, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also flagged the PDF with high confidence. The document body, though heavily obfuscated, contains text related to 'Star wars elite series imperial death trooper', suggesting a lure to entice users to click the malicious link.

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://cctraff.ru/123?utm_term=star+wars+elite+series+imperial+death+trooper In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384145/normal_5f9aa2e5c44ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410447/normal_5fdb98a381921.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479214/normal_5faf6ab98fc85.pdfIn PDF document text
    • https://cdn.sqhk.co/kizofapekeku/Bc7qhjg/pinball_2000_star_wars_episode_1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469101/normal_5fb29ecb0a5b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484143/normal_5ff2800269ba6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415070/normal_5fa4efd58d7ec.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/gomakobez/poetry_explication_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/851f7fb6-3d40-4c72-b4f4-4a509ac94fc0/ropinimekifes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/995eb19b-21f9-4d8a-8973-7fdb94d4e02c/88372782022.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/aace_international_conference.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/tadizawulatomebusafem.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/bitdefender_vpn_fr_android.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/business_performance_analyst_average_salary_uk.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_off0000cb5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB5C 5392 bytes
SHA-256: ef7396fe7d30d92d5e930d2a968f80249716cc39cd9b4090d6e7ebe9d79fe1b7
font_01_sfnt_off0000dd94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD94 10652 bytes
SHA-256: 4a894661decc1256ac0639390da1c786a299d6a634b1ac5b023a0a1a27a109b6

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