Malicious PDF — malware analysis report

Static analysis result for SHA-256 abf2b7b24e310161…

MALICIOUS

PDF

34.1 KB Created: 2021-06-28 20:43:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b208cd9886ffd2de972dc89ec5004bbf SHA-1: a6f7bbe8e66ad329825e69615745b1b2c67cf74a SHA-256: abf2b7b24e31016124b8c25973bb8d81beecd8776c86155237c85ddffa552cde
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically designed to lure users with promises of free game currency like Robux. The heuristic firings confirm the presence of malicious redirector links and a game hack lure, indicating a phishing or scam attempt. Although no scripts were extracted, the document's structure and embedded URLs strongly suggest it is part of a phishing campaign to redirect users to potentially 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.co/app/431946152/blox-land-where-you-get-free-robux-game-hack In PDF document text
    • https://alisa.com.tw/upload/files/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/how-to-stop-roblox-from-closing-when-hacking-with-dlls_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/free-spins-coin-master-links-blogger_GM406889139.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/free-roblox-money_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/go-to-this-website-for-free-robux_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/roblox-top-battle-games-read-online-free_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/exos-cheat-roblox_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/how-do-you-get-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/coin-master-spin-link-free-download_GM406889139.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/coin-master-promo-code-2021_GM406889139.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/free-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/ro-ghoul-script_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/auto-hockey-roblox-piano-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 7

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
font_00_sfnt_off00002d89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D89 22096 bytes
SHA-256: 7e11e3b6b1425b2bec0cf04d1bcaf2f6475567c428c53d614d9d97b8732f8063
font_01_sfnt_off00005eb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB2 19596 bytes
SHA-256: 9890fef653ed0aefddd555b82a41f6f554cab25beae8ee0a6f1f16e09df4e39a

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