Malicious PDF — malware analysis report

Static analysis result for SHA-256 f09a81687271f544…

MALICIOUS

PDF

49.4 KB Created: 2021-05-20 00:34:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b330122af33f0d289b4970241f3ac724 SHA-1: 9b9f7e14a0d0de1cb571162b2ee62d768c1afd93 SHA-256: f09a81687271f544a71046db937adcc93625abecba69926c536962dc7b8f3948
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a URL promising 'free Robux codes' and 'game hacks', a common lure for phishing or malware distribution. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure strongly suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9349

Heuristics 4

  • 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/free-robux-codes-no-human-verification-game-hack PDF link annotation
    • http://www.herbasacra.gr/images/coin-master-hack-apk-35-8_GM406889139.pdfIn PDF document text
    • http://www.herbasacra.gr/images/coin-master-gold-cards-hack-english_GM406889139.pdfIn PDF document text
    • http://www.herbasacra.gr/images/hack-a-game_GM431946152.pdfIn PDF document text
    • http://www.herbasacra.gr/images/coin-master-hack-apk-no-fb-login_GM406889139.pdfIn PDF document text
    • http://www.herbasacra.gr/images/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://www.herbasacra.gr/images/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://www.herbasacra.gr/images/hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://www.herbasacra.gr/images/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.herbasacra.gr/images/coin-master-free-spins-today-39_GM406889139.pdfIn PDF document text
    • http://www.herbasacra.gr/images/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdfIn PDF document text
    • http://www.herbasacra.gr/images/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://www.herbasacra.gr/images/all-minecraft-handbooks_GM479516143.pdfIn PDF document text
    • http://www.herbasacra.gr/images/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.herbasacra.gr/images/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.herbasacra.gr/images/robux-free-online_GM431946152.pdfIn PDF document text
    • http://www.herbasacra.gr/images/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • http://www.herbasacra.gr/images/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.herbasacra.gr/images/free-apk-mods-coin-master_GM406889139.pdfIn PDF document text
    • http://www.herbasacra.gr/images/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • http://www.herbasacra.gr/images/minecraft-18-9-hacked-client_GM479516143.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b18.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B18 29012 bytes
SHA-256: 375587cfa33f129ffbaa0b384cd2bfe1a98fc545f3d2bf80b2b40252695223c6
font_01_sfnt_off00008e05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E05 4616 bytes
SHA-256: ee05eca01f82cb0b3f03a92e59a1245623788df543d8f530dd3a846e2e30a3e9
font_02_sfnt_off00009c89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C89 19032 bytes
SHA-256: 7535c842b13f5ab09a8d1f6df205e44a1f60a7fdf3d88b4466f5e7b4ed5bfe6e

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