Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbcf0f8d1e5eb18a…

MALICIOUS

PDF

44.5 KB Created: 2021-05-15 10:34:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d7a4370742a84b1892dbccfcf745b5dc SHA-1: 8d756b4ae313f7acd9218e74c0d93fcd16c1bd49 SHA-256: bbcf0f8d1e5eb18a53130f51641e483c524e9b26dd0d218d368c1bd183493b8a
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a visual call-to-action, strongly suggesting a phishing or scam attempt. The ML classifier also flagged this PDF as malicious. The document body, though heavily obfuscated, contains references to game hacking, aligning with the heuristic findings of external URIs and callback lures. No scripts were extracted, but the presence of numerous links to potentially malicious sites indicates a high likelihood of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/how-to-hack-coin-master-apple-game-hack
    • http://sv-nahetal.de/images/free-coins-and-spins_GM406889139.pdf
    • http://sv-nahetal.de/images/how-to-hack-roblox-accounts-2021_GM431946152.pdf
    • http://sv-nahetal.de/images/minecraft-coins-free_GM479516143.pdf
    • http://sv-nahetal.de/images/free-robux-on-iphone_GM431946152.pdf
    • http://sv-nahetal.de/images/block-best-robux_GM431946152.pdf
    • http://sv-nahetal.de/images/coin-master-free-pet-food_GM406889139.pdf
    • http://sv-nahetal.de/images/free-game-pack-coin-master_GM406889139.pdf
    • http://sv-nahetal.de/images/coin-master-hack-online-android_GM406889139.pdf
    • http://sv-nahetal.de/images/hack-to-send-gold-cards-on-coin-master_GM406889139.pdf
    • http://sv-nahetal.de/images/how-to-earn-free-robux_GM431946152.pdf
    • http://sv-nahetal.de/images/coin-master-hacks-for-gold-cards_GM406889139.pdf
    • http://sv-nahetal.de/images/coin-master-free-spins-link-2021-twitter_GM406889139.pdf
    • http://sv-nahetal.de/images/how-do-you-get-free-daily-spins-on-coin-master_GM406889139.pdf
    • http://sv-nahetal.de/images/minecraft-games-online-free-no-download_GM479516143.pdf
    • http://sv-nahetal.de/images/free-minecraft-codes_GM479516143.pdf
    • http://sv-nahetal.de/images/funbloxxyz-free-robux_GM431946152.pdf
    • http://sv-nahetal.de/images/how-do-i-get-free-spins-on-coin-master_GM406889139.pdf
    • http://sv-nahetal.de/images/get-robux-for-free-2021_GM431946152.pdf
    • http://sv-nahetal.de/images/coin-master-hack-ios-cydia_GM406889139.pdf
    • http://sv-nahetal.de/images/coin-master-hack-apk-ios_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a16.bin
1bd48186d750ccc734c9ce3a28b0fbaf9057b1809b360ba34d7573a75078be6b
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A16 24948 bytes
font_01_sfnt_off00008209.bin
3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
pdf-font-stream PDF embedded font (sfnt) at offset 0x8209 2840 bytes
font_02_sfnt_off00008bba.bin
b6a735d9e3f53415aa491e3485cc1cfcf2c3f420c3f64ca45b3fcf2c99820254
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BBA 18128 bytes