Malicious PDF — malware analysis report

Static analysis result for SHA-256 578c7566729f0a00…

MALICIOUS

PDF

46.9 KB Created: 2021-06-08 08:50:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 26501b3e01e05dc436a21a6c6458b206 SHA-1: 6bd05b32893bcef7b74d94be8790b5f1e4c0bbfb SHA-256: 578c7566729f0a009004521ba836911a51d5663c92cb712d450ebe6b9b005e66
200 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a game hack redirector lure, which is also identified as a malicious redirector link. The document body and embedded URLs suggest a phishing attempt, impersonating Amazon to trick users into clicking a malicious link. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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/roblox-free-robux-codes-that-work-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
  • 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/roblox-free-robux-codes-that-work-game-hack In PDF document text
    • https://i-tech.ac.id/perpus/repository/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-roblox-money_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/is-there-a-way-to-get-free-robux_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_off00005356.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5356 27908 bytes
SHA-256: 9997bbf71bf81e1966d24258a9e536a4716d92a154c29ccec92dabebab9fbd25
font_01_sfnt_off00009263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9263 19128 bytes
SHA-256: 6c1620ab3a71c1ec70b3db53328434ad4f2dda24471aed413d24a4bc59f8f623

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