Malicious PDF — malware analysis report

Static analysis result for SHA-256 350ca879c914fbf4…

MALICIOUS

PDF

31.7 KB Created: 2021-07-20 03:03:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 68671036319d9846d0fefae0213301a4 SHA-1: 2a91f1507e71eda1b4bc89593832f1b655adecc3 SHA-256: 350ca879c914fbf4c70034ba641ed24e1ea2275aac1d7066cf1291eb39395600
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, including one disguised as a 'free generator / game hack'. The document body and embedded links suggest a lure for free in-game currency or similar, a common social engineering tactic. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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-likes-trial-game-hack In PDF document text
    • https://cosmosdawn.net/images/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • https://www.cosmosdawn.net/images/free-robux-discord_GM431946152.pdfIn PDF document text
    • https://cosmosdawn.net/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • https://www.cosmosdawn.net/images/free-tiktok-followers-instantly_GM835599320.pdfIn PDF document text
    • https://cosmosdawn.net/images/free-tiktok-likes-and-followers_GM835599320.pdfIn PDF document text
    • https://www.cosmosdawn.net/images/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://www.cosmosdawn.net/images/free-views-tiktok_GM835599320.pdfIn PDF document text
    • https://www.cosmosdawn.net/images/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • https://cosmosdawn.net/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.cosmosdawn.net/images/get-free-robux-now_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_off00002c22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C22 21648 bytes
SHA-256: eaff211c51eaca0860c5c5d8da15d7f311c8c45f554511af5256ea1dbb9f4d3a
font_01_sfnt_off00005b3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B3D 17756 bytes
SHA-256: 9d76c6faa2ac5c2cb25d5c28859cdf9fe3589154660ff5d1bcb1376c3aae0ade