Malicious PDF — malware analysis report

Static analysis result for SHA-256 857e7db48564cee0…

MALICIOUS

PDF

44.1 KB Created: 2021-05-17 12:07:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 122275f47f7dea3bee8fb6112752e76d SHA-1: 7381a2592ef76d3b0abc419dba62f55716bdd173 SHA-256: 857e7db48564cee02b17c720617c22f1efc0f96a74c2a63a04d08df024ba7f84
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including one identified as a malicious redirector. The document body and heuristics suggest a lure for free game items, likely to trick users into visiting a malicious site or downloading further malware. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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.xyz/app/479516143/how-to-get-minecraft-for-free-on-ipad-game-hack In PDF document text
    • http://baah.ca/images/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://baah.ca/images/woman-roblox_GM431946152.pdfIn PDF document text
    • http://baah.ca/images/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://baah.ca/images/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://baah.ca/images/free-roblox-hair-to-wear_GM431946152.pdfIn PDF document text
    • http://baah.ca/images/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://baah.ca/images/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • http://baah.ca/images/minecraft-free-download-2021_GM479516143.pdfIn PDF document text
    • http://baah.ca/images/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://baah.ca/images/minecraft-pe-apk-download_GM479516143.pdfIn PDF document text
    • http://baah.ca/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://baah.ca/images/complete-offers-for-robux_GM431946152.pdfIn PDF document text
    • http://baah.ca/images/free-spin-gratis-coin-master_GM406889139.pdfIn PDF document text
    • http://baah.ca/images/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://baah.ca/images/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • http://baah.ca/images/minecraft-for-laptop-free_GM479516143.pdfIn PDF document text
    • http://baah.ca/images/best-hacked-client_GM479516143.pdfIn PDF document text
    • http://baah.ca/images/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://baah.ca/images/master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://baah.ca/images/coin-master-free-spins-link-download-apk_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000484d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x484D 24380 bytes
SHA-256: 23ceef0f516ea232e1e2f0cbc6fb18e8d07796a76a2de09a11e71275ed71e135
font_01_sfnt_off00007fca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FCA 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off000089d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89D9 18224 bytes
SHA-256: 9e691df568453236f4d0ad162bd2f3ab3ed053816089b7695d089a9ceca8acc7