Malicious PDF — malware analysis report

Static analysis result for SHA-256 c70948eb2d993d55…

MALICIOUS

PDF

36.2 KB Created: 2021-07-04 16:45:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 77cf29ea2e07f0debdc722d55bd93ed0 SHA-1: ad596db6b1b181f6cd1a2f4c79d7d0e92508b79f SHA-256: c70948eb2d993d551a7a385995bab632dfd70c8e18e6333cf67950d9cb3e0320
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of game hacks and free in-game items to trick users into clicking malicious links. The document contains numerous links to redirectors and SEO link farms, including the primary malicious URL http://netcdn.tw/app/431946152/roblox-hack-site-game-hack. The presence of these links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9890

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/431946152/roblox-hack-site-game-hack In PDF document text
    • http://projectunionstreet.com/library/repository/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/free-downloads-for-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/minecraft-games-free-to-play-online_GM479516143.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/legit-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/codes-to-get-free-vip-in-roblox-mining-simulator_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/20210-free-spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/how-to-get-free-xp-in-pokemon-go_GM1094591345.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/coin-master-game-hack-app_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/how-to-get-free-stuffs-on-computers-roblox_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/free-robux-guide_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/comment-devenir-un-hacker-sur-roblox-2021_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/wurst-mc_GM479516143.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/how-to-download-minecraft-hacks_GM479516143.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
font_00_sfnt_off00002e0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E0D 22112 bytes
SHA-256: c8263bd2625487914dabc6d4d7b5bba95b763e13fb8bbb31fc78554412b412f7
font_01_sfnt_off00005eee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EEE 2820 bytes
SHA-256: 972979c3a46100cf5f8fd289bc6fbd2496ff75fec0e3f6753648c72ec6eba714
font_02_sfnt_off0000688d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x688D 18880 bytes
SHA-256: 6798a5860b29af3a79a68d7c52601d34cb5f107bdf36f63a1b46f66fdb0dc288

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