Malicious PDF — malware analysis report

Static analysis result for SHA-256 19d91352f1aac0fd…

MALICIOUS

PDF

35.6 KB Created: 2021-06-21 02:19:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: dbbb32dc6e6329dae3d4992545dde604 SHA-1: a7d022223e78d1a85dc34821bd623e685326783b SHA-256: 19d91352f1aac0fd98a789080a1f579d513f780fae31707183fd4094918733f3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to a malicious redirector, likely designed to deliver further malicious content or phishing pages. The document body and heuristics indicate a lure related to game hacks and free generators, aligning with common social engineering tactics. No scripts were extracted, but the presence of malicious redirector links and the lure suggest a phishing or malware distribution attempt.

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/how-to-hack-people-in-games-roblox-game-hack In PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/free-candy-20-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/free-candy-roblox_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/coin-master-hack-programers_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/free-robux-app-that-sends-code-to-your-email_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/coin-master-free-spin-and-coins-fbid-links_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/roblox-escape-games-free_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/how-to-hack-into-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/arsenal-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/free-800-robux_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/where-can-i-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/como-hackear-mad-city-roblox_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/robux-earning-websites_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/coin-master-hack-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/coin-master-gift-link_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/how-to-get-everything-free-on-roblox-2021-april_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/noob-vs-pro-vs-hacker-vs-god-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
font_00_sfnt_off000031f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31F7 22764 bytes
SHA-256: 4ed15bd34950c57cffc8c01eaa2069b1dbebbcd02bfa1550d1897d863b1136b4
font_01_sfnt_off00006500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6500 19412 bytes
SHA-256: ba84f1ecb12ad6ff9e07a393a5a60c0f1c6d545cb0fe3dfd6202fe99b1770f6d

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