Malicious PDF — malware analysis report

Static analysis result for SHA-256 1660630d64232edb…

MALICIOUS

PDF

38.5 KB Created: 2021-07-09 00:30:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 9741b6018ca7d52092afe303c6f90132 SHA-1: 5066489772464f5bdbc410e75d7184a31d073aa7 SHA-256: 1660630d64232edb25c44c4757aedd69366ca593eb8cf73cc08462c7c864d46e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically a URL associated with game hacks and free currency lures. The heuristic firings confirm the presence of malicious redirector links and a lure for game generators. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a phishing or scam attempt designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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/freespinandcoinblogspotcom-2021-11-coinmasterfreespinandcoinlinkshtml-game-hack In PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/levvvel-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/free-roblox-toys_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/roblox-paintball-cheat-codes_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/coin-master-how-to-get-free-pet-food_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/top-10-free-robux-sites-that-actually-worked_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/free-hair-on-roblox-promo-code-2021_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/free-robux-hack-july-2021_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/coin-master-32-mod-hack-unlimited_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/hack-version-of-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/como-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/tutorial-avanzado-de-cheat-engine-para-dragon-ball-rage-roblox_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/roblox-hack-me_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000338a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x338A 22700 bytes
SHA-256: 8669d64d0c39c653058ce9d26a74591a16999fce5248b5e95eba3a414cb34471
font_01_sfnt_off0000663f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x663F 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00007024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7024 19576 bytes
SHA-256: 1f6fe90e29780f620c300caf81dd3dc0229f82e574bfd1c4d8b0942b4ac7233e

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