Malicious PDF — malware analysis report

Static analysis result for SHA-256 82c087bfc41df6b8…

MALICIOUS

PDF

42.6 KB Created: 2021-05-13 00:35:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1ad914116af5666a1eeb1c7da145a343 SHA-1: 6b970f06f4efd20e1b2de463d50638a077dcc97b SHA-256: 82c087bfc41df6b8bf6b2ae28f500e77451cb232af96b8dc6991b147903ac9c9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game currency and hacks to trick users into clicking malicious links. The embedded links direct to known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or malware downloads. The document's structure and embedded links strongly suggest a phishing or social engineering attack aimed at driving traffic to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/coin-master-free-spin-link-today-2021-game-hack In PDF document text
    • http://reggieslockandkey.com/images/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-free-spin-link-today-download_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/daily-spin_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/minecraft-pocket-edition-hack_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/roblox-free-pets_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-robux-picture_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/games-like-minecraft-but-free_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-hack-spins_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/try-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/roblox-robux-hack_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
stream_003_off000049cd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49CD 24792 bytes
SHA-256: 6dfbe1b386f99fd2784e5f87ff0deadbd336659fbdaa7492cec92be5693b25d9
font_01_sfnt_off00008254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8254 18812 bytes
SHA-256: 209d45ed87732d827821998a5283e56b95c39a3af4032faff2e6da7d3e76f78f

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