Malicious PDF — malware analysis report

Static analysis result for SHA-256 487b2e3188e8319e…

MALICIOUS

PDF

51.0 KB Created: 2021-06-09 17:28:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ff018f9e775568bbe04bdc2a9058f62a SHA-1: e20f2d51b913dad59fff6c52c42348e5360e2fb0 SHA-256: 487b2e3188e8319e445d4ba153f5553dbd70155791fb33c477c509b54c2d9c13
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing. The file 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 0.9713

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.tw/app/431946152/1-000-free-robux-game-hack.
  • 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.tw/app/431946152/1-000-free-robux-game-hack PDF link annotation
    • https://unsla.uns.ac.id:443/pgsd/repository/free-roblox-passwords_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/coin-master-free-spins-for-iphone_GM406889139.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/coin-master-fan-hack_GM406889139.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/cheats-for-money-on-roblox-for-bloxburg_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/daily-free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/haktuts-free-spins_GM406889139.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/roblox-invincibility-hack_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/free-robux-febuary-2021-no-waiting-times_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/coin-master-online-hack-tool_GM406889139.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/get-free-spins-coin-master-october-2021_GM406889139.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/how-to-get-stuff-that-cost-coins-free-mpe-master_GM406889139.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/roblox-lovenet_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5242 25984 bytes
SHA-256: b5f53fe498c3937a4e0a288a789f0a565a8feaaef14bbee42af4a0c5c2047435
font_01_sfnt_off00008ea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EA8 3552 bytes
SHA-256: f19eae7c8ab9b4e853e54ab1a7d445f5b0db49f368e6bd2fd6ae2278b4bc4edc
font_02_sfnt_off00009a7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A7A 2816 bytes
SHA-256: 4555740682277f0055d57b15bd0ba953e5b51415ea3d21c93db391eace072d4f
font_03_sfnt_off0000a48b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA48B 18292 bytes
SHA-256: f5ee24c04dd5d05bb054bc25823dc7068512ff51c6316df7521779750e56dd29

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