Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c13ab5ce91cd4ce…

MALICIOUS

PDF

47.1 KB Created: 2021-05-15 01:33:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c03c83f8f91785a822c5fd875bf92b6b SHA-1: b710885d80dd6c86988bda7776909b1a92e68281 SHA-256: 7c13ab5ce91cd4ceffa16ba56c9d54c00032025641ee3aeb59602ff5d3b98f8e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded URLs that redirect to sites offering game hacks and free spins, a common lure for phishing or malware distribution. The ML classifier also flagged the PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure 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 0.8948

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/406889139/coin-master-free-spins-link-2021-march-game-hack PDF link annotation
    • http://bb-im2.com/images/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://bb-im2.com/images/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://bb-im2.com/images/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://bb-im2.com/images/minecraft-tower-defense-hacked_GM479516143.pdfIn PDF document text
    • http://bb-im2.com/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://bb-im2.com/images/roblox-free-vip-server_GM431946152.pdfIn PDF document text
    • http://bb-im2.com/images/free-gifts-coin-master_GM406889139.pdfIn PDF document text
    • http://bb-im2.com/images/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://bb-im2.com/images/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://bb-im2.com/images/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://bb-im2.com/images/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • http://bb-im2.com/images/download-hacked-games-coin-master_GM406889139.pdfIn PDF document text
    • http://bb-im2.com/images/roblox-dominus-free_GM431946152.pdfIn PDF document text
    • http://bb-im2.com/images/how-to-get-minecraft-bedrock-edition-on-pc-for-free_GM479516143.pdfIn PDF document text
    • http://bb-im2.com/images/clean-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://bb-im2.com/images/daily-spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://bb-im2.com/images/coin-master-free-spins-8-14-2021_GM406889139.pdfIn PDF document text
    • http://bb-im2.com/images/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • http://bb-im2.com/images/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://bb-im2.com/images/roblox-free-executor_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000484d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x484D 29940 bytes
SHA-256: 786d52cad674627e0ca9cf120c08e76d6a5cafcf7c17564552d4671e2479e39b
font_01_sfnt_off00008a20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A20 18624 bytes
SHA-256: 161e7b6ed1025749db9d27ab8af43de18d614588b68a514ec7b342862811dbc4
font_02_sfnt_off0000ad1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD1E 3264 bytes
SHA-256: e32c06502c11b52acb5e814091c5fdbffd1e2a904ac7a9cfb8b5b180bd139088

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