Malicious PDF — malware analysis report

Static analysis result for SHA-256 e79879b0329d2386…

MALICIOUS

PDF

45.5 KB Created: 2021-05-15 22:42:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: d09f842c20235ac0a3463e485f2f9894 SHA-1: 4ec0a3ac73facb1ce81444597dd63971abb689af SHA-256: e79879b0329d2386e092cd3dcea03853f48ab532a6549268d8de3127710c6f99
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to a known malicious redirector, disguised as a generator for free game items. The ML classifier also flagged this PDF as malicious. The primary lure appears to be a 'free generator / game hack' for Coin Master, directing users to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://netcdn.xyz/app/406889139/free-spins-coin-master-daily-game-hack In PDF document text
    • http://lib.unwahas.ac.id/repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/free-minecraft-maps-pe_GM479516143.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/how-to-get-free-coins-and-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/coin-master-hack-programmers_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/no-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/minecraft-java-edition-key-free_GM479516143.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/how-to-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/watch-videos-for-robux_GM431946152.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/fb-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/coin-master-website_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000491e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x491E 26224 bytes
SHA-256: c150f1e8eeff970aa50fd391050b41eb67e4f9b38cead96d69959e1690915012
font_01_sfnt_off0000852b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x852B 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008f16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F16 18308 bytes
SHA-256: 148513adc370bd80d4aa437ff839b9fedc0d32c70a1f1942828a2071191e315e

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