Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ff5c8e75ee55e24…

MALICIOUS

PDF

33.6 KB Created: 2021-06-25 00:24:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 98cca16da701b6b9337bddafac7346dd SHA-1: 48e2c92c7db9c6bf55368c647712e39f28e7740b SHA-256: 2ff5c8e75ee55e2480886bb0a15b508a8d7d87651e2980a0bf149b709f6c73e2
160 Risk Score

Malware Insights

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

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and free currency generators. The heuristic firings indicate that these links are associated with known malicious redirectors and lure users with promises of in-game advantages. The document body, though partially garbled, contains URLs that reinforce this lure, suggesting the primary purpose is to drive traffic to potentially harmful 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.co/app/406889139/coin-master-website-game-hack In PDF document text
    • https://encounternepal.com/userfiles/files/best-hack-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-get-daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-android_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/earn-robux-websites_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/minecraft-116-free-download_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-coins-for-flip-master-online_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/get-me-free-robux_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/pubg-uc-digi_GM1330123889.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/roblox-brick-bronze-free_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/hack-para-jailbreak-roblox-pc_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/is-tiktok-app-free_GM835599320.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/robux-game-com_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-roblox-accounts-that-work_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-real-hack_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_off00002ea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EA6 22424 bytes
SHA-256: 68f6681b313b806f61fdb8d902d03c2475e78b2e342ef872eac88488b028c189
font_01_sfnt_off000060a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A4 18192 bytes
SHA-256: d2203baa3f8808f575a7890d35593fb80413eb88c3c74b83b513cb0a3929aadd

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