Malicious PDF — malware analysis report

Static analysis result for SHA-256 51d57382b97864e4…

MALICIOUS

PDF

33.6 KB Created: 2021-06-29 14:47:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 42788f068e642b2ace1e9cbb8e3f8321 SHA-1: 69e3bf89c7ba707e6ec518a93f8be1b6d9c4638a SHA-256: 51d57382b97864e45684f4944b4fa36a3ea4209855974b352a33dd692d29434b
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users to websites offering 'free generators' or 'game hacks' for popular games like Roblox and Coin Master. The primary link directs to a known malicious redirector infrastructure. The document body and embedded URLs strongly suggest a phishing or scam attempt to trick users into visiting potentially harmful sites.

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.co/app/431946152/unlimited-robux-hack-pastebin-game-hack In PDF document text
    • http://library.ulb.ac.id//repository/latest-free-spin-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/get-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-2021-insoect_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-hack-link-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-spiderman-t-shirt-free_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-free-robux-on-windows-10_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/minecraft-pocket-edition-download-free-pe-calculator_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-links-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-many-has-roblox-warrior-cats-been-hacked_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-bear-face-mask-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-things-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/lua-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/minecraft-ore-finder-mod_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-hack-roblox-jailbreak-2021-money_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 2

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_off00002d92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D92 21572 bytes
SHA-256: 9d33ec84e04492fb2ba2982383f296969b4c962ab61528151dcea5bcbb0cc4a4
font_01_sfnt_off00005ca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA1 19608 bytes
SHA-256: 17868808a7e6bc5860f4ef7ae128562915ac0b93b494e386edbc38f38a0b11b3

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