Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8983667f10e21a6…

MALICIOUS

PDF

76.3 KB Created: 2021-03-17 23:56:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 105944a8c34dba1daf179658781d0aad SHA-1: d890e16ba21a561b3f3e5f03a01773a28e316f96 SHA-256: c8983667f10e21a625b1db51f66423497a29c7e8ac8c2bd9e5d6a263c6f5a2c1
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL, disguised as a user manual, likely leads to a phishing or malware download site. Although no scripts were explicitly extracted, the PDF format itself can embed JavaScript, which is often used for malicious redirection or exploitation.

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
  • 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://gimoguvi.ru/aws?utm_term=gemini+alarm+system+user+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4452853/normal_5fc80a0192f1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414500/normal_604a2bb624c6b.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/ehhjghb/savagapunadexatawapab.pdfIn PDF document text
    • https://cdn.sqhk.co/wuwoxegolewa/igfghhi/zawerosurivotuzosigajiko.pdfIn PDF document text
    • http://x-bionic.shop/86370994403hdxcp.pdfIn PDF document text
    • http://crystal-light33.ru/the_inferno_movie_download_in_tamiliwoqi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_6037ffbe485d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427105/normal_5fdbfabe8b1f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451563/normal_6003e59aea691.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501486/normal_5fef5af7c5309.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402721/normal_602c2e8b65f72.pdfIn PDF document text
    • https://cdn.sqhk.co/zotipimesaza/nthb1dD/ludo_star_for_windows_7.pdfIn 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/c178808a-e4e7-4bc5-813f-b72605380deb/what_is_the_moral_of_call_of_the_wild.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bf9b636-5bff-4934-9759-44ab66b50803/exhibition_proposal_letter_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/817d05bb-b06c-467c-96b8-c45139a44ad5/petit_prince_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfe9249b-a9e3-450b-8773-b041cc4d9aeb/what_ink_cartridge_does_hp_envy_4500_use.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2095ba9-132e-4252-9c8d-f076f85f5e90/99798076136.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/banejemodofokilone.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/bonivo.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_off0000eedb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDB 4964 bytes
SHA-256: 18d3282904636c6c6927f34e687fb28b7ce07568e15b096863fe277ceb40a27d
font_01_sfnt_off0000ffad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAD 10784 bytes
SHA-256: 65559582bf51623c161a1bb2a26657f7bd8003cf88cc86a636b677859b64f57b

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