Malicious PDF — malware analysis report

Static analysis result for SHA-256 32c94951769dd664…

MALICIOUS

PDF

44.4 KB Created: 2021-06-04 04:00:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c8b81d1c886e793cd0a27334edbdab16 SHA-1: 9a56275d77673485a8cb77f4859cdbe8894eabf4 SHA-256: 32c94951769dd6644e868210053699b9eb84533e2c11a1fc490e6627adf28035
162 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 appear to be part of a link farm designed to attract users searching for game hacks and free in-game currency. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these links, suggesting a malicious intent to drive traffic to potentially harmful content or exploit kits. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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 https://netcdn.online/app/431946152/how-can-you-get-robux-game-hack PDF link annotation
    • http://oca.undil.tl/repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-cracked-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/daily-free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/pokemon-go-5-free-raid-pass_GM1094591345.pdfIn PDF document text
    • http://oca.undil.tl/repository/can-you-earn-robux_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-free-card-link-today_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-shirts-roblox-that-i-can-copy_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/get-free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/roblox-skins-boy-free_GM431946152.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
stream_004_off00005108.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5108 25020 bytes
SHA-256: 6c0153f28ef27074ebd6afb8f48995d76e64707dfc1fc96211b22000c699d4e5
font_01_sfnt_off000089d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89D6 18508 bytes
SHA-256: e001fb7f5401862ae7bfe8451ef812ade6eb76ff5b39a99ee1f5160965f9e068

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