Malicious PDF — malware analysis report

Static analysis result for SHA-256 facaa31d32d3ae5c…

MALICIOUS

PDF

35.0 KB Created: 2021-07-06 09:16:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 93c85228e8b75c45979c21da1e2fabeb SHA-1: 79ee873a40e7237c8b25d8a5f398bc1637536d95 SHA-256: facaa31d32d3ae5cb2ea3eb01c9968ba96baed2b56e5ad99bd6b575eef329c73
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to websites offering game hacks and generators, indicating a lure for users to download potentially malicious content or visit scam sites. The heuristic 'PDF_SEO_LINK_FARM' suggests a large number of such links were generated, likely for SEO manipulation or to distribute malware. No scripts were extracted, but the document body and heuristics point to a phishing or scam campaign.

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/406889139/coin-master-hack-mod-apk-android-1-game-hack PDF link annotation
    • http://library.fisip.upnvj.ac.id/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/how-to-make-free-shirts-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/minecraft-apk-114_GM479516143.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/se-puede-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/how-do-you-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-spins-coin-master-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/mcpe-master-free-coins_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/minecraft-116-free-download_GM479516143.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/turkey-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-free-spins-fb_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/can-i-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_off00003076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3076 23492 bytes
SHA-256: 07ee91d1b337de5088e323b2dd03435f4bcff667ce09d3a61fea8a8656f98308
font_01_sfnt_off00006577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6577 18460 bytes
SHA-256: 3be7232d2d55ad1df906fc86075e5c59a8ef75c33394eb75378c4c29d382567b

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