Malicious PDF — malware analysis report

Static analysis result for SHA-256 d64d509cc2c91bb2…

MALICIOUS

PDF

79.0 KB Created: 2021-06-02 22:24:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7a7fd657f7657966b8867c22a80dcfc SHA-1: e0b6e17fb6243a75b489553191fae12b90de5946 SHA-256: d64d509cc2c91bb2b1f1c9a046d66268027f4437e9b54a0d6dd143311c849f04
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to phishing sites or download further malware. No scripts were extracted, but the PDF structure itself is used to host and present these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://pelibifir.ru/123?utm_term=tektronix+2225+50mhz+oscilloscope+manual
    • https://static.s123-cdn-static.com/uploads/4463526/normal_5ff9b496db0fb.pdf
    • https://wulafuxuzezam.weebly.com/uploads/1/3/2/3/132302924/susugifol_fewuzalelebi_bodamina_gefug.pdf
    • https://kolojadulosa.weebly.com/uploads/1/3/1/3/131397946/ae24d97c71bdcbc.pdf
    • https://nodeseverew.weebly.com/uploads/1/3/5/3/135323512/4324460.pdf
    • https://cdn-cms.f-static.net/uploads/4414687/normal_600a04f29ed91.pdf
    • https://tediresul.weebly.com/uploads/1/3/5/3/135345321/3577262.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lakebimutep.pbworks.com/f/kane_chronicles_book_3_weebly.pdf
    • https://uploads.strikinglycdn.com/files/61545c1d-8776-4e10-89f4-609386edf198/67186170749.pdf
    • https://uploads.strikinglycdn.com/files/9462c2e8-60b9-49b1-b22a-b36f4d5f4c5f/how_to_work_prepaid_electricity_meter.pdf
    • http://zikupuzajix.pbworks.com/f/9231521859.pdf
    • http://pamotekegopa.pbworks.com/f/zewolunetafabarezasuvu.pdf
    • https://uploads.strikinglycdn.com/files/a410342b-23ee-40c6-80dc-8d719aba2bea/62092071603.pdf
    • https://uploads.strikinglycdn.com/files/ce32871d-2811-4119-a11b-5ef1d1e83d41/bose_soundbar_500_remote_control_codes.pdf
    • http://rugewenuzed.pbworks.com/f/ccea_gcse_biology_revision_book_answers.pdf
    • https://uploads.strikinglycdn.com/files/6c1f1d8a-3a4c-438e-9709-c35dee01e9b8/56581284242.pdf
    • http://poxanoralanu.pbworks.com/w/file/fetch/144427134/focusrite_scarlett_solo_3rd_gen_settings.pdf
    • http://kufogokoges.pbworks.com/f/nivafapase.pdf
    • http://faxamom.pbworks.com/w/file/fetch/144472539/common_job_interview_questions_and_answers_for_high_school_students.pdf
    • http://mibegenav.pbworks.com/w/file/fetch/144462429/star_stable_holiday_calendar_cheat_sheet.pdf
    • http://vatojorisa.pbworks.com/w/file/fetch/144444951/repelisplus_apk_descargar_para_iphone.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0f7.bin
4e16119bf62d1c23879aa7f3c898b68678f92465d10737e373c08949626647f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F7 5704 bytes
font_01_sfnt_off00010440.bin
d309e510341a62ac54e6048c95c1ee375e56e3f205319d5ce682ee5df9c364bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10440 12308 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.