Malicious PDF — malware analysis report

Static analysis result for SHA-256 577ec49b6f5b39b0…

MALICIOUS

PDF

34.4 KB Created: 2021-07-04 01:33:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 015ab1b3e811d323a3ed7401700dfb34 SHA-1: f8dd002ecc4d889befb8a87aafaadafcf77f59fe SHA-256: 577ec49b6f5b39b0115ce4329225a84a4b069b89caebf2d0ac8c1e6cdc8d427e
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 'game hacks' and 'free spins'. The ML classifier strongly flagged this PDF as malicious, and heuristics indicate it's a lure for potentially unwanted content or further malware. While no scripts were extracted, the embedded URLs and the nature of the lures suggest an attempt to trick users into downloading or visiting malicious sites.

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/406889139/freespinandcoin-game-hack In PDF document text
    • https://amazingnepaljourney.com/userfiles/files/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/apps-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/how-to-hack-coin-master-game-without-verification_GM406889139.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/what-is-exploiting-in-roblox_GM431946152.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/minecraft-pe-hack-client-2021_GM479516143.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/is-deisgning-clothing-on-roblox-free_GM431946152.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/strucid-aimbot_GM431946152.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/minecraft-packs-free_GM479516143.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/cheat-for-mac-roblox-safe_GM431946152.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/get-a-free-dominus-from-roblox-toy_GM431946152.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/coin-master-real-hack_GM406889139.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/coin-master-official-fan-page_GM406889139.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/minecraft-account-hacked_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_off000030d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30D3 22808 bytes
SHA-256: 4b5a9b64c177ea684613285598394b8d337fa1d0b734de17a52306b8728e2229
font_01_sfnt_off0000640e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x640E 18244 bytes
SHA-256: 19494bed36003fadbe02431e250c62ef1698fa422030438aed600d934fd3a9e1

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