Malicious PDF — malware analysis report

Static analysis result for SHA-256 d82a5ef6f49ca0ad…

MALICIOUS

PDF

43.9 KB Created: 2021-05-17 00:13:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 1eb27d06c84033ac695095bf1f40feae SHA-1: 785d086e889b285db40f8180b4ef6317cdb5eeda SHA-256: d82a5ef6f49ca0adf2730fdc5afd927abcf64ed75196d9b580bd6823a5ed52f5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting a "Coin Master Free 2021 Spin Link" lure. The primary link identified is https://netcdn.xyz/app/406889139/coin-master-free-2021-spin-link-game-hack, which is flagged as a known malicious redirector. The document body, though partially corrupted, contains references to this lure and other similar game-related cheats, indicating a social engineering attempt to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/406889139/coin-master-free-2021-spin-link-game-hack In PDF document text
    • http://apostolosandreaslemesou.com/images/hack-coin-master-game-apk_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-spins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-printable-roblox-images_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/coin-master-cheats-for-free-spins_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-spins-coin-master-site-wwwquoracom_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/coin-master-free-spin-today-2021_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/coin-master_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/wurst-18_GM479516143.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/cute-free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-minecraft-accounts-2021_GM479516143.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/coin-master-daily-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/free-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/clean-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://apostolosandreaslemesou.com/images/how-to-get-free-skins-in-minecraft_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
stream_003_off00004be4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BE4 26852 bytes
SHA-256: 8a97daae459ae82ba4c45090fc5ffc17f74894cb2eff88b01c69dbc70193c8b0
font_01_sfnt_off000088e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88E7 18456 bytes
SHA-256: b7ae3d16bb028351929840db057611194e7c02105e6dbd3e36d0326cc4cd0414

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