Malicious PDF — malware analysis report

Static analysis result for SHA-256 787f7d5fa33be98b…

MALICIOUS

PDF

35.6 KB Created: 2021-07-09 07:40:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a36e68c94dd13725d2b1a04025d689f7 SHA-1: e790c2d852a289307f855e9ab7a6957e735b8f83 SHA-256: 787f7d5fa33be98b164249562ddf26a207fc0cff0bade94fc3d63902f832d701
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, disguised as a 'free generator' or 'game hack'. The document body explicitly mentions 'How To Get Free Robux' and includes a primary malicious URL. This indicates a phishing or scam attempt designed to lure users to potentially harmful sites.

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.tw/app/431946152/how-to-get-free-robux-on-chromebook-game-hack In PDF document text
    • http://shoruq.sch.ae/userfiles/files/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/free-coin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/coin-master-free-generator_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/live-roblox-bubble-gum-simulator-hack_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/robux-scam_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/coin-master-hack-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/minecraft-bedrock-free-download-pc_GM479516143.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/hack-team-roblox_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/roblox-hacks-hub_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/how-to-get-free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/my/tasksIn 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_off000032e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32E3 22464 bytes
SHA-256: 217eb5ee0249508d4ceae57bb1600874981723bcd0942fafed7998fb9ed1e9e2
font_01_sfnt_off000064e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E7 19580 bytes
SHA-256: 4d24750cd46ba26494693e05732daca39e52767fa8efd004c80234f7c57949b9

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