Malicious PDF — malware analysis report

Static analysis result for SHA-256 a941c3c989ffc32a…

MALICIOUS

PDF

42.5 KB Created: 2021-05-17 19:44:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c0bb189ac12234df949413681b79cc93 SHA-1: e7152193038a624dd67b24185a8da8b67a1a0757 SHA-256: a941c3c989ffc32a9aa19ec98f49f4e68783e04b75137f9b7a71307e453a489b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which are disguised as SEO-optimized content related to game hacks and free items. The presence of a "download button" heuristic and the ML classifier's high confidence score indicate a malicious intent to direct users to potentially harmful websites. The document's content and structure strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/free-spins-in-coin-master-2021-game-hack
    • https://mayastisingkawang.com/__statics/gudangsoal/files/how-to-get-minecraft-dungeons-for-free_GM479516143.pdf
    • https://mayastisingkawang.com/__statics/gudangsoal/files/coin-master-free-spins-hack-ios_GM406889139.pdf
    • https://mayastisingkawang.com/__statics/gudangsoal/files/how-to-hack-a-roblox-account-2021_GM431946152.pdf
    • https://mayastisingkawang.com/__statics/gudangsoal/files/coin-master-village-3_GM406889139.pdf
    • https://mayastisingkawang.com/__statics/gudangsoal/files/robux-free-gift-card-org-hack_GM431946152.pdf
    • https://mayastisingkawang.com/__statics/gudangsoal/files/coin-master-32-hack-apk_GM406889139.pdf
    • https://mayastisingkawang.com/__statics/gudangsoal/files/coin-master-free-spins-and-coins-daily-links_GM406889139.pdf
    • https://mayastisingkawang.com/__statics/gudangsoal/files/how-do-u-get-free-robux_GM431946152.pdf
    • https://mayastisingkawang.com/__statics/gudangsoal/files/minecraft-pocket-edition-apk-free-download_GM479516143.pdf
    • https://mayastisingkawang.com/__statics/gudangsoal/files/ear-free-spins-for-coin-master_GM406889139.pdf
    • https://mayastisingkawang.com/__statics/gudangsoal/files/coin-master-get-free-spins_GM406889139.pdf
    • https://mayastisingkawang.com/__statics/gudangsoal/files/coin-master-hacks-android_GM406889139.pdf
    • https://mayastisingkawang.com/__statics/gudangsoal/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdf
    • https://mayastisingkawang.com/__statics/gudangsoal/files/free-robux-hack-2021_GM431946152.pdf
    • https://mayastisingkawang.com/__statics/gudangsoal/files/coin-master-hack-mobile_GM406889139.pdf
    • https://mayastisingkawang.com/__statics/gudangsoal/files/free-robux-no-download_GM431946152.pdf
    • https://mayastisingkawang.com/__statics/gudangsoal/files/free-mojang-account-with-minecraft_GM479516143.pdf
    • https://mayastisingkawang.com/__statics/gudangsoal/files/free-robux-not-fake_GM431946152.pdf
    • https://mayastisingkawang.com/__statics/gudangsoal/files/rbxoffers-com-free-robux_GM431946152.pdf
    • https://mayastisingkawang.com/__statics/gudangsoal/files/roblox-play-now-for-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c2c.bin
a199a7f4f93630b0e55dde2b16774500bb902a526515363a521791b9f1652e02		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C2C 24792 bytes
font_01_sfnt_off0000838c.bin
875184ae642e109850636143811e44f85c5e94aa46544af5e3834b3aaa47422b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x838C 18288 bytes

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