Malicious PDF — malware analysis report

Static analysis result for SHA-256 4609e485d6b7cf24…

MALICIOUS

PDF

74.5 KB Created: 2020-11-29 08:42:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 85a15f466b2285ed5aacc66ceb957ad6 SHA-1: 156b328282f20c3821fb36c687c39ce6c1735904 SHA-256: 4609e485d6b7cf24ecd0242c660b1bc3ba49c48bee73b690fb961d1d87757a7b
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://gettraff.ru/strik?utm_term=cookie+clicker+ascension+strategy In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/96c235ab-ade2-4072-b495-9b64e44f2683/christianword_org_prayer_book.pdfIn PDF document text
    • https://s3.amazonaws.com/bunobu/nimekifu.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/jarefugamanemag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b13ad69-2938-4e98-87e9-6ada1065f7cb/27966666812.pdfIn PDF document text
    • https://s3.amazonaws.com/jaburirarov/kaimuki_high_school_class_of_1965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2336ddcc-b798-4faf-9949-6dceef9a4e0b/principles_of_polymer_systems_solution_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da77877a-82f9-44df-84ba-bad092806309/79231780245.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbba0869-472a-40a1-b1b2-b64ac1fd2978/skyscan_atomic_clock_instructions_87700.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/powabosagokuviz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b3fa813-82bf-49b3-b273-5ba01a5cceeb/67916872042.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1da71e1-de44-4d87-a9f9-f2d1d187cfd0/pekubijagido.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/pofazasunito.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/33302052008.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c1af387-eca3-42df-b591-0b2066353860/floyd_county_schools_calendar_2019-20.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51afb6df-c8d2-4ce7-9ec7-771c424879a9/79735842391.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_off0000e6a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A0 5036 bytes
SHA-256: 4264ce1e89a84f434161265b9c41c2042211be2c41a32452e471e26648959cf7
font_01_sfnt_off0000f7d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D9 10884 bytes
SHA-256: 48ae7e36e64d829e60e128a08eccb9ba27560f946f919f327d49b5a6715158e5