Malicious PDF — malware analysis report

Static analysis result for SHA-256 70b2b650529a7111…

MALICIOUS

PDF

33.8 KB Created: 2021-06-18 17:59:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 1bc51b2210bca5ffd727976806f2c5ac SHA-1: 0c6a2a7c6ced79762f4f209dca8d0a1bac49305b SHA-256: 70b2b650529a7111d5b95284e77eca5032e3a85b19c36027b0d671bdd34f4018
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, including a primary redirector at http://netcdn.co/app/431946152/free-cod-card-roblox-game-hack, which is flagged as malicious. The document body and embedded URLs suggest a lure for game-related cheats and currency, a common tactic for distributing malware. The ML classifier also strongly indicated maliciousness.

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/free-cod-card-roblox-game-hack In PDF document text
    • http://rollipolli.hu/userfiles/files/how-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/oprewards-robux_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/100-robux_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/roblox-lawsuit_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/get-robux-now_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/coin-master-free-spins-deutsch-download-2021-link_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-spins-and-coins-com_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/how-to-get-free-pets-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.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_off00002ef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EF3 21972 bytes
SHA-256: c8f0ce60944285b42d1aa6f8a4ab24eb8283ccf03ee79dae12195794559de8a5
font_01_sfnt_off00005f97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F97 18824 bytes
SHA-256: 9a6bd4daaf93bcc728989f4b928af5ff402ccc188c9935e25f83530a221d2183

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