Malicious PDF — malware analysis report

Static analysis result for SHA-256 38aeedcd3c2f2d09…

MALICIOUS

PDF

83.2 KB Created: 2021-05-25 21:26:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7497d886c41ee321bb101527b4d6cfd1 SHA-1: 9a20eeaa726aae81aabad97dadb24cbc126da12a SHA-256: 38aeedcd3c2f2d09d5f420b2629cb275e112c3682353409b282068252548abed
96 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 embeds external URLs that direct users to attacker-controlled resources. 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/strik?utm_term=carta+para+desear+una+feliz+navidad PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4478125/normal_601b49b9c305e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403413/normal_6019286e7de94.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/sevoga/40_rules_of_love_book_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/ultra_viewer_latest_version_free.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/medonoxamafu.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/mamusinokifazobajekiru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68b7ad68-dedb-4411-bda6-8ba486c483e9/excel_formula_if_cell_contains_text_then_multiply.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/confounding_variable_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/garunesezelixerab.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/jezonuzu.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/2008_jeep_grand_cherokee_srt8_common_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f7e4c22-4b78-494c-897a-63e74be4fe11/what_does_title_mean_on_1096_form.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_off000105d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D8 5052 bytes
SHA-256: 67fe6ca7034b2fa77a908ea62af51a311ebd4514d3dbcc98d5cc5ff514c41c2b
font_01_sfnt_off00011721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11721 12108 bytes
SHA-256: 2d666181287489efbd17328062479a146a24ef30a4001a447f919ca26158b23e