Malicious PDF — malware analysis report

Static analysis result for SHA-256 eac1ba421a731a93…

MALICIOUS

PDF

44.0 KB Created: 2021-05-12 05:03:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 7a80f37140e44104cc3110cee50638a6 SHA-1: 69e465d04448f2cefc5be6926cb3dc35fd293ae8 SHA-256: eac1ba421a731a93943b326c7fe175cd649903edd2a1029599af8582a3b87f97
102 Risk Score

Malware Insights

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

The PDF document contains multiple links and references to 'free Robux' and 'Coin Master hacks', indicating a lure for users to download potentially malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of both a redirector URL and an IP address literal further supports a malicious intent to host and serve harmful files. The document's purpose is to trick users into downloading further malware by exploiting their interest in game-related cheats.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.xyz/app/431946152/how-to-get-free-robux-without-paying-game-hack PDF link annotation
    • http://202.182.59.89/perpus/repository/free-robux-generator-com-roblox-hack_GM431946152.pdfPDF link annotation
    • http://202.182.59.89/perpus/repository/free-downloads-for-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://202.182.59.89/perpus//repository/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://202.182.59.89/perpus//repository/daily-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://202.182.59.89/perpus//repository/coin-hackhub-coin-master_GM406889139.pdfIn PDF document text
    • http://202.182.59.89/perpus/repository/minecraft-jar-free_GM479516143.pdfIn PDF document text
    • http://202.182.59.89/perpus//repository/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://202.182.59.89/perpus//repository/coin-master-time-speed-hack_GM406889139.pdfIn PDF document text
    • http://202.182.59.89/perpus//repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://202.182.59.89/perpus/repository/free-roblox-gfx_GM431946152.pdfIn PDF document text
    • http://202.182.59.89/perpus/repository/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://202.182.59.89/perpus//repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://202.182.59.89/perpus//repository/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • http://202.182.59.89/perpus/repository/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://202.182.59.89/perpus/repository/collect-free-spin-linms-coin-master_GM406889139.pdfIn PDF document text
    • http://202.182.59.89/perpus//repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://202.182.59.89/perpus//repository/hack-de-coin-master_GM406889139.pdfIn PDF document text
    • http://202.182.59.89/perpus//repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://202.182.59.89/perpus//repository/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • http://202.182.59.89/perpus/repository/free-spins-coin-master-2021-no-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
stream_003_off00004b21.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B21 25940 bytes
SHA-256: 9f1c02bb2db6805135da7c6674e32dd981dc2eff6edf18a5d6f51a366e96b002
font_01_sfnt_off000085b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85B1 19616 bytes
SHA-256: cf429e2e91354d73b6f0728fc312d6ff4bad20be80a5ba6db32adcb01c969c4a

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