Malicious PDF — malware analysis report

Static analysis result for SHA-256 78363cf381b2fa6a…

MALICIOUS

PDF

43.8 KB Created: 2021-05-12 14:03:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 064b48e2de52677f45dde1296d83f41d SHA-1: 3423107849821495bc0669b53995de64ffa334ae SHA-256: 78363cf381b2fa6ae3433a6e02e6c0478354f754ff86998b324dba42ca23970a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'free generators' and 'game hacks'. The ML classifier strongly flagged this PDF as malicious, and heuristic rules identified it as a redirector lure. The document body, though heavily obfuscated, contains URLs that are consistent with a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/freespinandcoin-blogspot-game-hack In PDF document text
    • https://daringmanbs.manbengkuluselatan.sch.id/__statics/gudangsoal/files/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://daringmanbs.manbengkuluselatan.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://daringmanbs.manbengkuluselatan.sch.id/__statics/gudangsoal/files/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://daringmanbs.manbengkuluselatan.sch.id/__statics/gudangsoal/files/free-robux-come_GM431946152.pdfIn PDF document text
    • https://daringmanbs.manbengkuluselatan.sch.id/__statics/gudangsoal/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://daringmanbs.manbengkuluselatan.sch.id/__statics/gudangsoal/files/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • https://daringmanbs.manbengkuluselatan.sch.id/__statics/gudangsoal/files/free-robux-generator_GM431946152.pdfIn PDF document text
    • https://daringmanbs.manbengkuluselatan.sch.id/__statics/gudangsoal/files/coin-master-fun-hack-online_GM406889139.pdfIn PDF document text
    • https://daringmanbs.manbengkuluselatan.sch.id/__statics/gudangsoal/files/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://daringmanbs.manbengkuluselatan.sch.id/__statics/gudangsoal/files/is-roblox-studio-free_GM431946152.pdfIn PDF document text
    • https://daringmanbs.manbengkuluselatan.sch.id/__statics/gudangsoal/files/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • https://daringmanbs.manbengkuluselatan.sch.id/__statics/gudangsoal/files/robloxhacks_GM431946152.pdfIn PDF document text
    • https://daringmanbs.manbengkuluselatan.sch.id/__statics/gudangsoal/files/coin-master-free-spin-app-iphone_GM406889139.pdfIn PDF document text
    • https://daringmanbs.manbengkuluselatan.sch.id/__statics/gudangsoal/files/roblox-download-pc-free_GM431946152.pdfIn PDF document text
    • https://daringmanbs.manbengkuluselatan.sch.id/__statics/gudangsoal/files/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://daringmanbs.manbengkuluselatan.sch.id/__statics/gudangsoal/files/extra-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://daringmanbs.manbengkuluselatan.sch.id/__statics/gudangsoal/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://daringmanbs.manbengkuluselatan.sch.id/__statics/gudangsoal/files/instagram-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://daringmanbs.manbengkuluselatan.sch.id/__statics/gudangsoal/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://daringmanbs.manbengkuluselatan.sch.id/__statics/gudangsoal/files/minecraft-hacked-client-112-2_GM479516143.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004df0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DF0 25040 bytes
SHA-256: d41004435fc810dd5f21c3b9f07d81ca30a931af149925acffd04613176e535f
font_01_sfnt_off00008801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8801 18636 bytes
SHA-256: 39ad49e7f2f7b1e1661e6b5506a71ed4a13bb8570fb289ec0037d4e7a36d4803

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