Malicious PDF — malware analysis report

Static analysis result for SHA-256 4625b0758edc02bf…

MALICIOUS

PDF

34.9 KB Created: 2021-07-03 20:16:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ae32fa37a07a9d2ac787b402e3147042 SHA-1: 3615665c047752e42916e5ff86e115b44d40c709 SHA-256: 4625b0758edc02bfa9b31b9309af95b7da6ee5a1ae2b4f4350ff55ae18fa9884
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting 'free generators' and 'game hacks' for popular games. The document body and heuristics indicate a lure to download potentially malicious software. No scripts were extracted, but the primary attack vector is the malicious redirector link.

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/431946152/roblox-exploit-download-game-hack In PDF document text
    • https://labdagatismk1pundong.com/repository/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.labdagatismk1pundong.com/repository/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
    • https://www.labdagatismk1pundong.com/repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • https://www.labdagatismk1pundong.com/repository/instant-robux_GM431946152.pdfIn PDF document text
    • https://www.labdagatismk1pundong.com/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/qtx-roblox-free-download_GM431946152.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/minecraft-app-store-free_GM479516143.pdfIn PDF document text
    • https://www.labdagatismk1pundong.com/repository/free-spin-coin-master-link-download_GM406889139.pdfIn PDF document text
    • https://www.labdagatismk1pundong.com/repository/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • https://www.labdagatismk1pundong.com/repository/como-usar-cheat-engine-en-roblox-dragon-ball-rage_GM431946152.pdfIn PDF document text
    • https://www.labdagatismk1pundong.com/repository/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/roblox-hacked-bloxy_GM431946152.pdfIn PDF document text
    • https://www.labdagatismk1pundong.com/repository/coin-master-mod_GM406889139.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://www.labdagatismk1pundong.com/repository/how-to-get-free-robux-2021-may_GM431946152.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.labdagatismk1pundong.com/repository/free-robux-generator-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_off00003040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3040 22352 bytes
SHA-256: 208da80c47ec36656ab28fe553d945638c568d652d327d322a9a5faa9769e24e
font_01_sfnt_off00006229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6229 19392 bytes
SHA-256: 222653fb6e77f57885132882620f81ded5cfebf97e881e1f0191fa7fa6f2d083

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