Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e25065e7a80a66a…

MALICIOUS

PDF

78.4 KB Created: 2021-02-17 22:47:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0c23aca652f245b06781623a32e7ed09 SHA-1: 116e9ce03c158fe3f7dbebbf322598e3995b7cbe SHA-256: 4e25065e7a80a66acea7a1f0a30e2d0c57c0613fb3baabdabfc9e705127dae05
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body and embedded URLs suggest a phishing or social engineering attack, attempting to trick users into downloading APK files. While no scripts were explicitly extracted, the PDF format can embed JavaScript, which could be used to facilitate the download or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wix?keyword=how+to+install+apk+files+on+firestick PDF link annotation
    • http://true-board1.club/43427278686svr9m.pdfIn PDF document text
    • http://helpcontactform.com/stupid_zombies_3_mod_apk_download_apkpurek1kae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366400/normal_5fff92f21e210.pdfIn PDF document text
    • https://cdn.sqhk.co/relulapezele/g2kegdA/rivusefuvimokajobunet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383131/normal_5fd8fa8f690cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467274/normal_5fdab27fa04eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402280/normal_5fc7676ce1926.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420930/normal_5ffdffc5c9293.pdfIn PDF document text
    • http://thecabinets.xyz/kathi_movie_bgm_songs_freey4q1b.pdfIn PDF document text
    • http://yogait.space/administrative_assistant_resume71ib2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426966/normal_5fdec5de6addd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lavaraf.epizy.com/bisi_alawiye_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/systems_of_inequalities_worksheet_word_problems.pdfIn PDF document text
    • http://kogosiji.epizy.com/xoxudatalovedix.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE1 5124 bytes
SHA-256: 6f81748ea805aae5e8670a55546ec77c7b93827414ce15782f8139053771ea6e
font_01_sfnt_off0000f076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF076 11512 bytes
SHA-256: 842d73d504449f83f382313d59b23f7df1b2de3ff4960d6dcab87c3b09a9d436
font_02_sfnt_off00011771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11771 16060 bytes
SHA-256: 676c0883841b43d00b7ee9e48740bba0cd0e68334271d7a078f050a57dd23d8c

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