Malicious PDF — malware analysis report

Static analysis result for SHA-256 da571d3d6658c104…

MALICIOUS

PDF

45.3 KB Created: 2021-05-13 01:39:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4f87ad54706e22f174a992c5400f0445 SHA-1: c26b2cdd3917a8672d626d0e481ca29752682df4 SHA-256: da571d3d6658c10420a838505f3244e68eefed0d7bcd7f40511948adc0aaf845
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple links to external websites, many of which are disguised as game hacks or free currency generators for popular games like Roblox and Coin Master. These links likely lead to phishing pages or download sites for further malware. The ML classifier also strongly indicated maliciousness, supporting the assessment of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 https://netcdn.xyz/app/431946152/can-you-give-me-robux-game-hack PDF link annotation
    • http://katalog.ireyogya.org/repository/coin-master-hack-that-actually-works_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/minecraft-java-code-free_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-promo-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-roblox-animations_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-do-you-get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/minecraft-pe-apk-download-free-015-0_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/win-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-spins-and-coins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/httpswwwurcouponsdealcom202103coinmasterfreespinandcoinlinkshtml_GM406889139.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_003_off00004905.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4905 30968 bytes
SHA-256: ac7bbf64cdff476619a3d6b50129fd941a69dc5e03ff15d0b78d7eac9fd6c3eb
font_01_sfnt_off00008dae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DAE 18668 bytes
SHA-256: 3334d56de644c5130d7cfce4c730b38c4c16fd76a637e538689659e13837f7db

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