Malicious PDF — malware analysis report

Static analysis result for SHA-256 48f9a86b9905f1ac…

MALICIOUS

PDF

35.1 KB Created: 2021-07-08 01:13:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6017b61085beaac45219408de7252f29 SHA-1: 553a0e85fa26b71ec87ec39f89455521b8b23a5b SHA-256: 48f9a86b9905f1acb8e5a5cb133a375be81335896858caf37edd6ae8e4d0447f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one pointing to known malicious redirector infrastructure at http://netcdn.tw/app/431946152/free-robux-site-game-hack. The document body and embedded URLs suggest a lure for free Robux or game hacks, a common social engineering tactic. The presence of embedded URLs and the nature of the lure indicate a likely attempt to direct users to potentially malicious websites for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/free-robux-site-game-hack In PDF document text
    • https://elearningma.ypi-islamiyah.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • https://elearningma.ypi-islamiyah.sch.id/__statics/gudangsoal/files/free-roblox-user-and-password_GM431946152.pdfIn PDF document text
    • https://elearningma.ypi-islamiyah.sch.id/__statics/gudangsoal/files/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://elearningma.ypi-islamiyah.sch.id/__statics/gudangsoal/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearningma.ypi-islamiyah.sch.id/__statics/gudangsoal/files/roblox-space-outpost-tycoon-script-hack-2021_GM431946152.pdfIn PDF document text
    • https://elearningma.ypi-islamiyah.sch.id/__statics/gudangsoal/files/free-robux-giver-real_GM431946152.pdfIn PDF document text
    • https://elearningma.ypi-islamiyah.sch.id/__statics/gudangsoal/files/free-card-number-roblox_GM431946152.pdfIn PDF document text
    • https://elearningma.ypi-islamiyah.sch.id/__statics/gudangsoal/files/free-robux-quiz_GM431946152.pdfIn PDF document text
    • https://elearningma.ypi-islamiyah.sch.id/__statics/gudangsoal/files/gui-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://elearningma.ypi-islamiyah.sch.id/__statics/gudangsoal/files/free-safe-roblox-exploits_GM431946152.pdfIn PDF document text
    • https://elearningma.ypi-islamiyah.sch.id/__statics/gudangsoal/files/yt-fmm-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elearningma.ypi-islamiyah.sch.id/__statics/gudangsoal/files/how-to-make-a-group-in-roblox-2021-free_GM431946152.pdfIn PDF document text
    • https://elearningma.ypi-islamiyah.sch.id/__statics/gudangsoal/files/roblox-hack-eploit-jailbreak_GM431946152.pdfIn PDF document text
    • https://elearningma.ypi-islamiyah.sch.id/__statics/gudangsoal/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearningma.ypi-islamiyah.sch.id/__statics/gudangsoal/files/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • https://elearningma.ypi-islamiyah.sch.id/__statics/gudangsoal/files/free-tiktok-likes_GM835599320.pdfIn PDF document text
    • https://elearningma.ypi-islamiyah.sch.id/__statics/gudangsoal/files/roblox-robux-hack-no-survey-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearningma.ypi-islamiyah.sch.id/__statics/gudangsoal/files/free-robux-using-lucky-patcher_GM431946152.pdfIn PDF document text
    • https://elearningma.ypi-islamiyah.sch.id/__statics/gudangsoal/files/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://elearningma.ypi-islamiyah.sch.id/__statics/gudangsoal/files/free-robux-and-builders-club-generator_GM431946152.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
font_00_sfnt_off00002fab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FAB 23272 bytes
SHA-256: a455463fcdc4537bb1f647e5140b85b902893fea308ba6aff194a82fe4bc01c6
font_01_sfnt_off0000645b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x645B 18940 bytes
SHA-256: f9f1f7c9b928d5f6ce6bf7d440be5e4499b495936a7ada93416c0d904b92215a

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