Malicious PDF — malware analysis report

Static analysis result for SHA-256 e471aba8d2c969ad…

MALICIOUS

PDF

33.9 KB Created: 2021-07-06 06:55:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 3131843df7c569fcc78d175491c62955 SHA-1: db438a5dc6685bed15ac7c5e1e7db3201467637d SHA-256: e471aba8d2c969ada44576816aba2225b22fb69a03cbbfdaf87722c248dec0d4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, that masquerade as game hacks or generators. These links likely lead to further malicious content or phishing sites. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, but the embedded URLs and the nature of the lures suggest a phishing or scam attempt.

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/479516143/how-to-downgrade-minecraft-pe-game-hack In PDF document text
    • http://lib-smansumsel.sch.id/repository/games-in-roblox-that-give-you-robux_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-pics_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-microsoft-rewards_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-add-mods-to-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-do-you-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-all-free-items-2021_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-www-com_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/if-roblox-wasn-t-free_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/hack-coin-master-nyc_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-coin-master-card-free_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FB7 22312 bytes
SHA-256: 506027d7abe1607b3c8e142a75caf7f88184cfc9b6ffec39d6f26ee94481d3f9
font_01_sfnt_off000060d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60D9 18656 bytes
SHA-256: f671632c41bdcd8896512b89e0179723263a2bce0274879a7730ace5e1a9329c

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