Malicious PDF — malware analysis report

Static analysis result for SHA-256 31de80d8c4f6ad80…

MALICIOUS

PDF

46.8 KB Created: 2021-06-03 10:12:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: bccabcbdda6218e7d03480f4b7a1e458 SHA-1: ab1ebb520bb1d8e27bd9791f8150f76036f31d11 SHA-256: 31de80d8c4f6ad804fecf54c72913e045c18b25afa19fd0b034b7e6fb0e3bc27
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to external resources, including a primary link identified as a malicious redirector for 'game hacks'. The document body, though partially corrupted, also contains references to these lures. The presence of these links and the heuristic firings strongly suggest the document is designed to trick users into visiting malicious sites, likely to download further malware or engage in fraudulent activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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 https://netcdn.online/app/406889139/coin-master-hack-ios-without-verification-game-hack In PDF document text
    • http://perpustakaan.idia.ac.id/repository/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/robux-place-rewards_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-free-spin-2912-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/what-tiktok-free-robux_GM835599320.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/client-minecraft_GM479516143.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/links-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/https-iosgodscom-topic-20218flipmastercoinshack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-free-spins-2021-generator_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/how-to-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/how-to-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/get-free-robux-the-real-way_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/roblox-avatar-com_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/roblox-trolling_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-robux-no-verification-2021_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051b9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51B9 24672 bytes
SHA-256: 20432addec3774cd18f4c86b0e19f65ab8bf130661461594327f6f334397cd85
font_01_sfnt_off00008a43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A43 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off000093f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93F6 18356 bytes
SHA-256: 7ef4325f158cf31b011cc902030ab99f5d38ab06b2a6580cc11f556557bfb0ea

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