Malicious PDF — malware analysis report

Static analysis result for SHA-256 164c698ddbb792f1…

MALICIOUS

PDF

44.9 KB Created: 2021-06-11 06:41:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: b9bbe1ea6a7559af44beebbe7efd8ef1 SHA-1: 095ea3570dec3ea08f0d494778aa226f5be7c7fd SHA-256: 164c698ddbb792f14b1d81e0fcaff78f3d6381d10e305991e416f1499ae86f24
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game-related items, directing users to a URL associated with malicious redirector infrastructure. The ML classifier also flagged this PDF with high confidence. While no scripts were extracted, the document's structure and embedded links strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.tw/app/431946152/paginas-web-para-conseguir-robux-gratis-sin-hacks-2021-game-hack In PDF document text
    • http://library.yamasi.ac.id/repository/safe-hack-for-coin-master-android_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-you-get-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coins-master-hack_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/tiktok-free-like-followers_GM835599320.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-girl-hair-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/earn-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-spins-and-coins-from-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/btools-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/games-for-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-spins-cash_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050f5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50F5 25724 bytes
SHA-256: dc668ff9957c98a225769fdfc485e2dd3d5711753c5fe0095fa6a33c7f33cf7f
font_01_sfnt_off000088e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88E3 19516 bytes
SHA-256: 7694d05a97a8ac66242d889359a7075601c8dbbac6b432c55c9a988f5a4e1786

Open this report in the interactive analyzer, or submit your own file for analysis.