Malicious PDF — malware analysis report

Static analysis result for SHA-256 190007ed632112ed…

MALICIOUS

PDF

35.0 KB Created: 2021-07-07 08:35:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 5fd6f6faca95a94ee79f39ba0a7cfb77 SHA-1: 08317bc27344c1bf4832832deb8895bd2cc40cbf SHA-256: 190007ed632112ed7543d7d9cf95a1268688634b00be04b754dd8c44c687796a
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on what appears to be a free generator or game hack. These links redirect to malicious infrastructure, specifically http://netcdn.tw/app/431946152/get-free-robux-no-human-verification-game-hack, which is flagged as a malicious redirector. The document body and embedded links suggest a scam related to in-game currency or hacks for popular games like Roblox and Coin Master. No scripts were extracted, but the primary attack vector is likely social engineering via malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/get-free-robux-no-human-verification-game-hack In PDF document text
    • https://3qblocks.com.tw/image/data/files/roblox-dungeon-quest-get-unlimited-gold-and-free-vip_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/roblox-us-hack_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-roblox-royale-high-outfits_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-hack-apk-33-download_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-speed-hack-in-roblox-without-cheat-engine_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-get-a-robux-gift-card-for-free_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/get-free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/roblox-earn_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-daily-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/minecraft-world-free-download_GM479516143.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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_off00003107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3107 22360 bytes
SHA-256: 6494bfae03e9a8b6000cb23abae6589f9cf90728eeb0c1919dbb3cfd98fcf035
font_01_sfnt_off00006313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6313 19336 bytes
SHA-256: a90fe5938b7c8c7d620c675c61825ef91391e60c8f891a39cc2f187e1f68d0cb

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