Malicious PDF — malware analysis report

Static analysis result for SHA-256 d60e3aea1a5d87ab…

MALICIOUS

PDF

35.6 KB Created: 2021-06-29 19:37:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c1ccd34e9ca911f01f01df32ff0ba67c SHA-1: 156e15e0eded1d4d5cdc23de2c28fea89164dccb SHA-256: d60e3aea1a5d87ab8931927102c9398417ab1777dc6a85991fdb887e5bc7fcd3
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users with promises of free game items and currency, such as 'Hack The Plaza Beta On Roblox'. These links point to known malicious redirectors and a large number of SEO-optimized PDF links, indicating a campaign to drive traffic to potentially harmful sites. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or scam campaign.

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/hack-the-plaza-beta-on-roblox-game-hack In PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-animation-free-download_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-make-roblox-clothes-for-free_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-get-free-roblox-com_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-get-free-robux-in-the-missions_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-pro-roblox-gear_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/infinite-robux-cheat_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/robux-free-c_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-horror-games-multiplayer-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/hack-de-robux-100-real-no-fake_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-card-link-coin-master_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/watch-videos-for-robux_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/egg-farm-simulator-hack-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/minecraft-free-online-unblocked_GM479516143.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/instagram-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/show-me-how-to-get-free-robux_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
font_00_sfnt_off0000330e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x330E 22632 bytes
SHA-256: b22726bdf815dff9d6adc6b7b6b772c90a4935bd532e58ca63b29e45013354dd
font_01_sfnt_off000065dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65DC 19164 bytes
SHA-256: f18327ff2692386dd2499d8a064ebaddcd886cc865428de9705530eff2c67300

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