Malicious PDF — malware analysis report

Static analysis result for SHA-256 792e1efeccee2d3f…

MALICIOUS

PDF

79.2 KB Created: 2021-03-16 21:59:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e27a52e8c55639918fb7cc03e7c42994 SHA-1: 219bcca7410396df2681ab4e7060051ff9d5aafd SHA-256: 792e1efeccee2d3fa7e769f382f3d26157060d665f8acc73abaee8c3b3757e72
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing operation. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, indicating the document's purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://botokaw.ru/wix?keyword=flyertalk+amex+platinum+airline+credit+delta PDF link annotation
    • http://bovibuvebus.getenjoyment.net/sloan_flushmate_recall.pdfIn PDF document text
    • http://ideal-it.fun/zipijonazor5n7w.pdfIn PDF document text
    • http://pokupka.space/57629350790h6j9v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401985/normal_60055e3e569f3.pdfIn PDF document text
    • https://cdn.sqhk.co/nikofejujel/gjfgijd/33262622464.pdfIn PDF document text
    • http://jakesubinosol.scienceontheweb.net/62169005000.pdfIn PDF document text
    • https://cdn.sqhk.co/nunepokuwe/riahhgg/big_buck_hunter_2_sportsman_s_paradise.pdfIn PDF document text
    • http://fisujerekuvij.getenjoyment.net/kenmore_700_series_washer_spin_problems.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471275/normal_5fee632483443.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392195/normal_600b98619154b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472475/normal_604d1c626122f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b2f3f1fb-4f3f-4d5d-be65-f5b10dce6288.filesusr.com/ugd/735189_b2ed0658781f487b8f90571e79a9715d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2fdd01a-277b-42c5-813c-da8b4babba1a/export_garageband_project_to_mp3.pdfIn PDF document text
    • https://e5b7f393-9b83-42c5-a877-5b85c0c772c8.filesusr.com/ugd/77b42d_a8a9dc82fdf14fdba784ba036422b5af.pdf?index=trueIn PDF document text
    • https://47a25507-5c4f-4e73-9b7c-0c49514c8174.filesusr.com/ugd/e00bd3_5afcb126690d4455bb9111a5ac77da21.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/abcfc6e6-de2e-45b7-be2d-a457a94f1aa3/zepikegowifijatuji.pdfIn PDF document text
    • http://fidalanono.myartsonline.com/what_are_the_common_citation_styles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8f58045-ab28-49ac-9d9b-d0a1bd06163c/15784025686.pdfIn PDF document text
    • https://88966db1-4a83-4446-b941-f65022a6235f.filesusr.com/ugd/928e0f_59c25736c51147b18a34fb91d9d4ac87.pdf?index=trueIn PDF document text
    • https://e0a971b2-7104-4718-9e5f-4f17d768618f.filesusr.com/ugd/6d43b6_1d659e8ccf91445e96db3ee99c16f5e7.pdf?index=trueIn 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_off0000f645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF645 5232 bytes
SHA-256: d47420f43fa6dc0b2c13398325707cac7214f23332ecb23bf79fd010e394d506
font_01_sfnt_off0001080a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1080A 11472 bytes
SHA-256: 39e1d40b07bf56b1646f673e35588faaa8289d4df12908dacd0b7aa67ae5a63c

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