Malicious PDF — malware analysis report

Static analysis result for SHA-256 4afd80c50b255da8…

MALICIOUS

PDF

34.2 KB Created: 2021-07-06 10:42:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 2ba2d5f6a1c2c865c3c053a534b6006f SHA-1: 26259d7a5e709753edb8e2e6c97aaa5de1df6a31 SHA-256: 4afd80c50b255da891e0af0f420bea06910b26d977bdfdebdd80bf7ca23f0399
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one critical heuristic identifying a redirector to 'free generator / game hack' content. The document body also contains the same URL, reinforcing the lure. This indicates a phishing attempt to redirect users to potentially malicious sites, likely for credential harvesting or further 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/406889139/coin-master-free-link-2021-game-hack In PDF document text
    • https://library.sman1berau.sch.id/repository/wizard-hacks_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-earn-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-do-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-getting-hacked_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-tiktok-followers-and-likes-no-human-verification_GM835599320.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/wurst-112_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-valid-codes-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-spins-without-verification_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/como-hackear-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-spins-coin-master-apple_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-roblox-rom_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/youtube-roblox-dax-she-cheated-roblox-code_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/kazuin-how-to-hack-in-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-win-free-robux_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_off00003044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3044 22404 bytes
SHA-256: 6f38b4c303a57ef424bd3d1dfbee5ba2b2eba4c5d41643b1a03a954fc6e72d04
font_01_sfnt_off00006217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6217 18568 bytes
SHA-256: 5c6f2b8c8950227f34c0c7c762a0319831c5dcbb819f0110f1dbfe9ff8d1e338

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