Malicious PDF — malware analysis report

Static analysis result for SHA-256 22d1a46f1fa45586…

MALICIOUS

PDF

34.3 KB Created: 2021-07-03 22:18:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 01fbabc0e070ed88470bcdb0813933a3 SHA-1: e87ffafddeb00d16aea14b7538af6791a00c0a22 SHA-256: 22d1a46f1fa45586a4052bbea0d604d208631ccedb903c9af87ceafd55861d65
142 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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-cheat-generator-d-game-hack PDF link annotation
    • https://www.ferraroni.net/public/risorse/ck/files/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/avatar-de-roblox_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/minecraft-18-9-hacked-client_GM479516143.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/get-coins-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/coin-master-free-attack_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/robux-hack-without-installing-apps_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/wurst-client_GM479516143.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/coin-master-daily-spins_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/chicken-farming-simulator-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/free-minecraft-packs_GM479516143.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/how-to-hack-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • https://www.ferraroni.net/public/risorse/ck/files/free-spins-coin-master-links-no-human-verification_GM406889139.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_off00002fff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FFF 22936 bytes
SHA-256: 8ae9e4eee079a6cb0b1eb7a0b7254b0a9b04a7f7f551abe5b6d1d19a4d10af5b
font_01_sfnt_off00006345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6345 18336 bytes
SHA-256: fda0060c16eb65076ac55bb0a0e579631bd9564dc5908b57aa0b9f2438c54af4

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