Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba2ac67a5e8b092d…

MALICIOUS

PDF

35.3 KB Created: 2021-07-08 08:41:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: edd1d7ea4a87d6c8751079a955582335 SHA-1: 6bea073dc00c3da5d4e6b0afe801a7fc2af1d2fa SHA-256: ba2ac67a5e8b092d530f8da56db5974c0ec39d9db1c040bea74a8704de87850e
160 Risk Score

Malware Insights

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

The PDF document contains links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free spins' for popular games. The ML classifier strongly flagged this PDF as malicious, and the embedded links are associated with known malicious redirectors. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lure users to a compromised site, likely for further exploitation or credential harvesting.

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/coin-master-spins-2021-game-hack In PDF document text
    • https://allhimalayantreks.com/userfiles/files/games-to-get-you-free-robux_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-cheats-without-verification_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-spin-coin-master-link-today_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/real-roblox_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/atlantis-overlord-bubble-gum-simulator-cheat-code-roblox_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/www-robux-redeem_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-robux-only-username_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-minecraft-accounts-2021_GM479516143.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-coins-for-flip-master-online_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/roblox-phantom-forces-credits-hack-2021_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-free-spins-and-coins-today_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000032bd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32BD 23108 bytes
SHA-256: fbd4dd4f6dc99262cd84e91e22b0b5731ca575fddd8c3a2ddb3ac3c92281c98b
font_01_sfnt_off000066bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66BB 18412 bytes
SHA-256: b75e5ef993f57d3daa6e8a2ce07d141862f5d749ef2e58f79798588bbec5ce21

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