Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8ecc6237c755f34…

MALICIOUS

PDF

78.3 KB Created: 2020-12-10 13:44:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: b33aa7203a475f707d9d63bed11587f5 SHA-1: 732c00778d0055d9a49d9a60db5637b9f1dd9dab SHA-256: c8ecc6237c755f344a0b95f4eec5fb0f9286084d0d6805a92c391003246fb518
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading a malicious application. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafficel.ru/aws?utm_term=brothers+in+arms+3+apk+new+version PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444092/normal_5fa1b6d204e8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425908/normal_5fd162ea52f35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415080/normal_5f9846b0e82de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421061/normal_5f9c27e4479c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366984/normal_5fb9c3a929597.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485318/normal_5fb4c7674da64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470681/normal_5fb6d2501e8b0.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nowonovege/2527378543.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0fbb61c8c741314323605/t/5fcd80dbd235d37878dcf61a/1607303388086/gajorajapaz.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/gojegofalegakukepubazo.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/free_american_flag_stars_template.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc55f48bdb33045eee0080d/t/5fc65c00f81c9a2a0c7cf1e4/1606835201063/infectonator_survivors_full_game_hacked.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/wavojuj.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000eea8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xEEA8 9208 bytes
SHA-256: 2d62ac61aafdc6fc0d1b21e382577697101f9e6c8ba3cfd8b2b070f9841d75d6
font_00_sfnt_off0000d16e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD16E 3012 bytes
SHA-256: 1f704321da6c9533394e3daca62f4c9b2d8e087e2f11655debdc550516026f40
font_01_sfnt_off0000dc36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC36 5456 bytes
SHA-256: 69d6a8955818130df76f8be381d2e3cd807efa06098bd6d824b4175f03ff640a
font_03_sfnt_off00010798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10798 10608 bytes
SHA-256: 5cbe2376f8f1cb2fda106ae32d08495d1932c9c62ee4b981d2bad63a60124f26

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