Malicious PDF — malware analysis report

Static analysis result for SHA-256 907b663bd81c51ae…

MALICIOUS

PDF

34.1 KB Created: 2021-07-04 22:47:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: ad773c6c425ab82c99fe8b98d91159b3 SHA-1: 85ae6e34ad0a064f5dedd78ea1e49e1b6e841c42 SHA-256: 907b663bd81c51aeef041ecb5ac2278fab129e338b2534cdb2b4aa59f297cf3d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirector lure, pointing to malicious infrastructure. The document body and embedded URLs reinforce this, indicating a social engineering attempt to trick users into visiting a malicious site. No scripts were extracted, but the primary attack vector appears to be a phishing lure leading to a redirector.

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/406889139/coin-master-cheat-to-get-free-spins-game-hack In PDF document text
    • https://library.sman1berau.sch.id/repository/4-op-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-roblox-tickets-hack_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/collect-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-minecraft-texture-packs-java_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/flip-master-free-coins_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-2021-november_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/online-hacking-tricks-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-robux-2021-april_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/rbx-space-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-cards-free-cards_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/como-hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-coins-and-spins-daily-summary_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-for-kids-no-verification_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_off00003130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3130 22288 bytes
SHA-256: d1239bc5a4a4d1566c1b04c1df59f9e07e61bdd9fbbd7030204560746dd97023
font_01_sfnt_off0000629d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x629D 18340 bytes
SHA-256: 2b2f286d68f126638810e23e754f1e5bfaa812598f8232f2eb1ff378893a9330

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