Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dd13a0a7feb0d29…

MALICIOUS

PDF

34.6 KB Created: 2021-06-27 08:07:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 309df4e94204c5c6b78d79723c2d869c SHA-1: 5ac13438f947c3a5feb78a19a3c9309f4f978879 SHA-256: 1dd13a0a7feb0d294b0a10276b08ca3da0c0e12884d7be5a295fb5a50a10f172
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game currency and hacks to entice users. It contains a large number of external links, many pointing to other PDFs hosted on academic domains, suggesting a link farm or SEO manipulation tactic. The primary URL, http://netcdn.co/app/431946152/easy-no-survey-free-robux-game-hack, is likely a redirector to malicious content or a phishing page. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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.co/app/431946152/easy-no-survey-free-robux-game-hack PDF link annotation
    • http://uilis.unsyiah.ac.id/ebook/repository/ooby-give-you-free-robux-husky-roblox-youtube_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/how-to-free-robux-legit_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/how-to-disco-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-800-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/cheat-engine-alternative-for-roblox_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/sk8-hack-roblox_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/roblox-cheat-engine-november-2021-download_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-game-pack-with-google-play-coin-master_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/coin-master-hoe-to-get-extra-free-spins_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/avatar-animation-free-roblox_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/pubg-uc-with-jazz-cash_GM1330123889.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_off00002f3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F3A 22776 bytes
SHA-256: 4e4aa1ecc1a32f7c186caeb0919968bc9d2bdfb20379b3d95382b7afab8d9347
font_01_sfnt_off00006232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6232 19012 bytes
SHA-256: 82f814eb5b3249315d5a415790d1894e3465d89649be47f8e2df9eca6a0114bd

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