Malicious PDF — malware analysis report

Static analysis result for SHA-256 279dae0bbed16971…

MALICIOUS

PDF

34.6 KB Created: 2021-07-04 00:28:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 0fad9e2b20e828de1b7fd99373cb2347 SHA-1: 983f673db08c40078088b1bfb6a3b0182d0d063b SHA-256: 279dae0bbed16971fedc558a84b502e3ae3257b7963df0e7d29de521d5d3bd14
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to redirector domains, including one specifically identified as malicious. The document body and extracted URLs suggest a lure related to free game hacks and in-game currency, aiming to trick users into visiting malicious sites. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs points towards a potential download or further exploitation.

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/479516143/will-minecraft-ever-be-free-game-hack In PDF document text
    • http://artistaone.co/userfiles/files/free-spin-and-coin-blogspot_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/free-roblox-clothes-list_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/roblox-inappropriate-games_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/get-1-robux-free_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/comment-hack-booga-booga-roblox_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/how-to-make-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/how-to-get-your-hacked-roblox-account-back_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/apk-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/hacks-for-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/how-to-get-free-clothes-on-roblox-2021-ipad_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/robux-win-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/free-spins-generated-from-coin-master_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/roblox-free-mvp_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/roblox-promo-codes-2021-free_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_off0000336f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x336F 21996 bytes
SHA-256: 393810711aad2ef8e6b8fd6bdcb013cf8051c62ec435929b8feb77bc6915b1d9
font_01_sfnt_off0000642b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x642B 18460 bytes
SHA-256: ff9350cabebb90671f53b39f5ebb095a1547985ecb9ab55cbe00cf3bc8f410c6

Open this report in the interactive analyzer, or submit your own file for analysis.