Malicious PDF — malware analysis report

Static analysis result for SHA-256 f02f5b990cb90460…

MALICIOUS

PDF

34.6 KB Created: 2021-07-03 17:35:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1922f0b5ba7e71a12eeca9cdf1ee7bb4 SHA-1: 809a8497c4944eb33a309292501f66f2f7e80563 SHA-256: f02f5b990cb90460b5cfec7d732e02220fbd1d62de26c8aa64f60c0ab427ef0d
142 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, many of which are hosted on apotema.com.co and promise game hacks and free currency for popular games like Coin Master and Roblox. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a malicious intent to drive traffic to potentially harmful sites. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/406889139/coin-master-hack-here-game-hack PDF link annotation
    • http://apotema.com.co/ufiles/files/coin-master-daily-free-coins-link_GM406889139.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/free-tiktok-followers-real_GM835599320.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/how-do-hack-your-money-on-roblox-ultimate-driving_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/how-to-hack-mcpe-master-coins_GM406889139.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/how-to-make-a-free-server-in-minecraft-java_GM479516143.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/roblox-hacks-2021-may-20_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/www-robux-tv-free-robux_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/coin-master-download-hack_GM406889139.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/free-robux-live_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/how-to-download-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/btools-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/coin-master-free-spins-link-without-human-verification_GM406889139.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/free-robux-today_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/free-robux-watch-add-to-get-robux_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/codes-to-get-free-robux_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
stream_002_off000031cb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31CB 22976 bytes
SHA-256: 10871f3129ba121899a6040ab5d067cb1fe87f9841350e1532854293cc207772
font_01_sfnt_off00006580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6580 18004 bytes
SHA-256: 2f3a5855c5bac228d8d27cc7f61b57eebad79d58a924e470a0477843dff273c7