Malicious PDF — malware analysis report

Static analysis result for SHA-256 35803446e0e981ab…

MALICIOUS

PDF

76.4 KB Created: 2021-06-13 14:09:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: fe3a68efb28fc8f7a9ce840b40f4b955 SHA-1: 95e7ce452ab1bfc767cfde7050037aaa7ec40109 SHA-256: 35803446e0e981aba04d8006cd360e2a9e59d3ce8268912fbd190ba500c58957
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 0.9997

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://yafferge.ru/123?utm_term=igcse+biology+notes+pdf+2019 In 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://uploads.strikinglycdn.com/files/1b7ed7e7-bb00-4ec5-bda3-3ed6aac92074/types_of_lock_picking_tools.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c185b2de-3c40-45b7-9e31-151def295738/kojexeruw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74e28b72-d99a-4391-84a5-9529c5eaf16d/moketadevebitolubudepomem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42617867-b9b7-4ebc-80d4-1a73e4f4c442/amazon_fire_hd_8_tablet_case_walmart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bd71761-9d1c-436f-a131-364fe15afb5c/wejuririmozidojim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5585c9a-7d4f-437b-ac5a-d64abfa934b3/the_passionate_shepherd_to_his_love_and_the_nymphs_reply_to_the_shepherd_quiz.pdfIn PDF document text
    • http://sekodegaxex.pbworks.com/w/file/fetch/144906351/you_make_my_dreams_daryl_hall__john_oates.pdfIn PDF document text
    • http://javefanudosa.pbworks.com/f/gagejo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bfec20f-ccde-4a79-8e5a-239a066a6df5/what_to_put_on_resume_for_waitress_skills.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91956466-5a1b-4a4c-8211-437934fc8aa9/9818882969.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50dcfa35-13d7-4b53-9503-15081424754f/galaxy_s5_release_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acb51ecb-0a71-4b02-bd1f-4c9c35fbf596/pibikegifexir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67502b69-9868-4a66-ad02-b4eaec530bc6/jiwirirusuladeje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49b7a17b-88af-43cf-afeb-885eab708307/xuvejiwuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c2404a6-3132-4b58-aa06-c290ad88f8a3/83080557099.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26cce73f-f1ea-43ec-925c-9edcbbdfcfd8/dopegasob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd07b517-d35b-45d4-8849-3ac175916333/kuvezo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faeee8ac-01db-4294-8fa9-dfcf19f5c349/a_raisin_in_the_sun_movie_summary_1961.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54536903-388b-4a4b-92b0-d16fc7df867a/sindhu_bhairavi_serial_in_tamil_latest_episode.pdfIn PDF document text
    • http://kevuxezedila.pbworks.com/w/file/fetch/144445668/98505024075.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_off0000de3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3A 5464 bytes
SHA-256: 036421b79162d23259cc9d2efcdf3fe606471e3ebab2b7b8d84f47b90103939a
font_01_sfnt_off0000f0de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DE 10992 bytes
SHA-256: 5626ab5e6cec3c3d842fae7f4f8a3445cd146f3b25627e9562b70c4019c863ff
font_02_sfnt_off000115de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115DE 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34