Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0ed77de7cd1b7c7…

MALICIOUS

PDF

35.5 KB Created: 2021-07-04 18:20:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a137e5906289d01e99cae72e01dfb8cd SHA-1: 5c2975bc691a605631f353be09fbcb100db3ff00 SHA-256: c0ed77de7cd1b7c77673c480e838a47e03d70245fd1f529b94ee76e61f1c2b5c
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a lure of 'free Robux' and game hacks to entice users to click on embedded links. The primary link, http://netcdn.tw/app/431946152/free-robux-no-survey-or-human-verification-game-hack, likely leads to a malicious site or phishing page. The document also contains a large number of SEO-optimized links pointing to other PDF files, suggesting a link farm or content-spamming operation designed to drive traffic to potentially malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/free-robux-no-survey-or-human-verification-game-hack PDF link annotation
    • https://perpus.poltekkesgorontalo.ac.id/repository/how-to-login-to-cerberus-roblox-hacker_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/how-to-hack-coin-master-game_GM406889139.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/how-to-cheat-in-roblox-ninja-legends_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/free-roblox-games-to-play-now_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/free-tiktok-followers-no-downloads_GM835599320.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/freegames911com-coinmastertipsandcheats2021freecoinsandspins_GM406889139.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/b-tool-hack-in-roblox-link-jailbreak-heli-bomb_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/prison-life-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/roblox-high-school-cheats-horror_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/free-coins-for-flip-master_GM406889139.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/free-roblox-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/roblox-free-download-meepcity_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/coin-master-generator-free_GM406889139.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/how-to-get-free-clothes-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/hack-roblox-pastebin-com_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/roblox-greenlegocats123-free-robux_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/coin-master-apk-hack-mod-download_GM406889139.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
font_00_sfnt_off0000323d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x323D 22276 bytes
SHA-256: b9d9d921fd4fcc029115c10d066b8b81ccbb52aab08ca1736df18cb772bcf27e
font_01_sfnt_off000063e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E6 19628 bytes
SHA-256: cdea958d27f31e1bb93a151c26d135a3dbedf9ed5520af1903eb9fa34a77bfdd

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