Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a23969de137cf31…

MALICIOUS

PDF

34.4 KB Created: 2021-07-06 03:36:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: a05218b5bf6aeb45674957c7a0cc17ec SHA-1: 356e9ab525468b8a673d8470f1596edf25195ce5 SHA-256: 2a23969de137cf3178a494addbfce83aef824ceeebd794a1429a944e8e95a4a4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks and generators. The heuristic firings indicate these links are part of a known malicious redirector chain. The document body, though truncated, contains URLs consistent with this lure, suggesting the primary goal is to drive traffic to these malicious sites.

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/minecraft-pocket-edition-apk-free-download-game-hack In PDF document text
    • http://sttlets.education/senayan/repository/free-robux-card-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/hack-de-robux-gratis_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/roblox-free-robux-hack-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-robux-videos_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/real-working-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-spins-on-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/coin-master-2021-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-private-minecraft-server_GM479516143.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/roblox-adopt-me-free-money_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/how-can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/robux-hack-download-pc-2021_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/hack-coin-master-apk-32-download_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/robux-free-2021-september_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/roblox-hotel-empire-tycoon-cheats_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/coin-master-free-spins-link-no-verification-code_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/online-hacking-tricks-coin-master_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-have-200-robux-free-robux-2021_GM431946152.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_off000030fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30FC 22020 bytes
SHA-256: b4960255fb3a48d147ea28d0b90cf316f818b7da676e8cdb00a66f4fe0badf3e
font_01_sfnt_off0000619c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x619C 19080 bytes
SHA-256: eaa44c016b5e2fcb469ce124d9c10d2bdfbf681199bf2aba0125fc2b94f64bf0

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