Malicious PDF — malware analysis report

Static analysis result for SHA-256 d34a805ffb7a88f3…

MALICIOUS

PDF

33.3 KB Created: 2021-07-20 19:02:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 1e0eaa780d88a913fe4e7fc076cce4a0 SHA-1: 96f2f13e040ae2cdb1f41890424bb661af1e530d SHA-256: d34a805ffb7a88f30e9c25be92f1cf9ae5afedd35c62f9ead44f7ae983123126
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirector infrastructure, specifically advertising "free generators" and "game hacks" to lure users. The primary link directs to http://netcdn.tw/app/835599320/free-tiktok-followers-without-verification-game-hack, which is flagged as malicious. The document body and embedded artifacts suggest a lure for engagement, likely leading to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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/835599320/free-tiktok-followers-without-verification-game-hack In PDF document text
    • http://asiasieja.pl/images/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://asiasieja.pl/images/minecraft-free-online_GM479516143.pdfIn PDF document text
    • http://asiasieja.pl/images/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • http://asiasieja.pl/images/minecraft-hack-download_GM479516143.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_off00002c28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C28 22900 bytes
SHA-256: 1d0646875d5412170f2076cf4873363f2f47aa6640e64ef9554fdd26f37bc53c
font_01_sfnt_off00005f42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F42 18560 bytes
SHA-256: 4328f2d9021fda272d6942102c30ad90396447c40598e55ae21b07e1aa723a10