Malicious PDF — malware analysis report

Static analysis result for SHA-256 d578c1f422695bf2…

MALICIOUS

PDF

35.4 KB Created: 2021-07-08 05:29:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 8b096e0a42139eb713600e84016e06ca SHA-1: 481f35439e37bb71cc60eea576a0f726d760df46 SHA-256: d578c1f422695bf266d3bd9cd3e2e5a5f5bb413719612267f001abf9f094f416
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that lead to a known malicious redirector, disguised as a generator for game currency. The document body and heuristics indicate a lure for free game items, such as Robux or Minecraft hacks. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing or scam attempt.

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/431946152/100-robux-game-hack In PDF document text
    • http://elearning.mialhidayahkotamadiun.sch.id/__statics/gudangsoal/files/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://elearning.mialhidayahkotamadiun.sch.id/__statics/gudangsoal/files/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://elearning.mialhidayahkotamadiun.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://elearning.mialhidayahkotamadiun.sch.id/__statics/gudangsoal/files/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://elearning.mialhidayahkotamadiun.sch.id/__statics/gudangsoal/files/free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://elearning.mialhidayahkotamadiun.sch.id/__statics/gudangsoal/files/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mialhidayahkotamadiun.sch.id/__statics/gudangsoal/files/free-robux-august-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mialhidayahkotamadiun.sch.id/__statics/gudangsoal/files/free-robux-unpatchable_GM431946152.pdfIn PDF document text
    • http://elearning.mialhidayahkotamadiun.sch.id/__statics/gudangsoal/files/coin-master-hack-tool-v1-9-download_GM406889139.pdfIn PDF document text
    • http://elearning.mialhidayahkotamadiun.sch.id/__statics/gudangsoal/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mialhidayahkotamadiun.sch.id/__statics/gudangsoal/files/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mialhidayahkotamadiun.sch.id/__statics/gudangsoal/files/coin-master-hack-download-apk_GM406889139.pdfIn PDF document text
    • http://elearning.mialhidayahkotamadiun.sch.id/__statics/gudangsoal/files/free-bandana-on-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mialhidayahkotamadiun.sch.id/__statics/gudangsoal/files/coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • http://elearning.mialhidayahkotamadiun.sch.id/__statics/gudangsoal/files/roblox-how-to-play-games-for-free_GM431946152.pdfIn PDF document text
    • http://elearning.mialhidayahkotamadiun.sch.id/__statics/gudangsoal/files/ro-ghoul-script_GM431946152.pdfIn PDF document text
    • http://elearning.mialhidayahkotamadiun.sch.id/__statics/gudangsoal/files/unlimited-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mialhidayahkotamadiun.sch.id/__statics/gudangsoal/files/wurst_GM479516143.pdfIn PDF document text
    • http://elearning.mialhidayahkotamadiun.sch.id/__statics/gudangsoal/files/can-oyu-sell-a-roblox-shirt-for-free_GM431946152.pdfIn PDF document text
    • http://elearning.mialhidayahkotamadiun.sch.id/__statics/gudangsoal/files/coin-master-free-spin-link-new_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_off00003329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3329 22668 bytes
SHA-256: 41ade734b4eb6cd458f85a3372379d1926495b83f965ca3990f7e10d6a9a78af
font_01_sfnt_off0000661b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x661B 18828 bytes
SHA-256: 119893438dfdee07160b20114d595d80c7b0a9a0af49c5fc1e20f3c535fc2fc3

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