Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf1fa4c7000d419b…

MALICIOUS

PDF

33.9 KB Created: 2021-06-30 00:16:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4485c1be3436ac3504dc766523fdf5bb SHA-1: 237c7cf9be8ecc02ee36fe614984c1e520fc5d4c SHA-256: bf1fa4c7000d419b1f25ccd145e26686c6fb943e2fa13e8cfa9050f017730dc9
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which are structured as SEO-optimized PDF files related to game hacks and cheats. The primary URL, http://netcdn.co/app/431946152/hacks-for-roblox-o-survey-game-hack, appears to be a redirector or landing page for these lures. This indicates a likely attempt to drive traffic to malicious or scam-related content, potentially for ad fraud or further malware distribution.

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/hacks-for-roblox-o-survey-game-hack PDF link annotation
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/how-to-get-free-bloxbux-in-roblox_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/how-to-get-roblox-money_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/how-to-fly-in-roblox-hack_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/veste-free-game-roblox_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-spin-ios_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/robux-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/how-to-get-coin-master-card-free_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/coin-master-money-hack_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/coin-master-tricks_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/roblox-free-skin_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 6

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_off00003081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3081 21220 bytes
SHA-256: 38b6144d85f30780733b8d56c76f48b66507c49ec9b40bcd7ab9cba267a8308f
font_01_sfnt_off00005eb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB2 19256 bytes
SHA-256: 2ecc04a4a6af4942f2c691a7c7d104f959dac94fd99a58767d05688e2146c9a1

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