Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1e1ca60cdbc3655…

MALICIOUS

PDF

46.9 KB Created: 2021-06-10 21:22:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3b62f7d8b610338aa04adebcc63f19a2 SHA-1: b0d8410a9d7d333021b99da3653f02c239d7b05b SHA-256: b1e1ca60cdbc36555c08ff71c3235ae9ea42a40169617cff2f9f64412bd2a67e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links to known malicious redirectors, masquerading as game hacks and free item generators. The primary link, https://netcdn.tw/app/431946152/roblox-sonic-costume-without-robux-and-free-youtube-vid-game-hack, is identified as a lure for free game-related content. The document's structure and embedded links suggest an attempt to exploit user interest in free in-game items or cheats, leading them to potentially harmful websites. No scripts were extracted, but the PDF's nature and the identified malicious links strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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 https://netcdn.tw/app/431946152/roblox-sonic-costume-without-robux-and-free-youtube-vid-game-hack In PDF document text
    • https://reggieslockandkey.com/images/free-roblox-items-codes_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-robux-games_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • https://reggieslockandkey.com/images/i-cant-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/john-doe-roblox-hacker_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-coins-coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/secret-skin-combination-get-free-robux_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/daily-spin_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/cheats-and-codes-for-roblox-for-pc_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-robux-promo-codes-2021-not-expired_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/roblox-of-free_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/game-give-free-robux_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-admin-no-download-roblox_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-do-you-hack-roblox_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
stream_004_off00005344.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5344 27212 bytes
SHA-256: 2259e6442001ffa45a1d34b21a9e4ed04f662f8b08963c39007c35ab5c2f2c5b
font_01_sfnt_off00009193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9193 19408 bytes
SHA-256: d2da2744aafd204803b238a3e03dbb6a2d07a68bad6929f73d16a54da91d85f3

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