Malicious PDF — malware analysis report

Static analysis result for SHA-256 16a1b684ecc07866…

MALICIOUS

PDF

48.7 KB Created: 2021-06-10 19:39:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 31c4afd2e351110b7b70d9daceb4b9d7 SHA-1: b600b870abbc35f56e6e2950ded5b81baef8730c SHA-256: 16a1b684ecc07866944fa39642be8f2f72e2f22a930b358f6faf3b9ba1a4383b
102 Risk Score

Malware Insights

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

The document presents itself as a game cheat or hack, which is a common lure for advance-fee scams and malware distribution. The presence of multiple embedded URLs, including one pointing to a potential download, strongly suggests the document's intent is to trick the user into downloading a malicious payload. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.tw/app/431946152/ben-10-universal-showdown-roblox-cheats-game-hack
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/simplysarc_GM479516143.pdf
    • http://lib.bppsdmp.pertanian.go.id/main/repository/coin-master-cheats_GM406889139.pdf
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/coin-master-free-spins-23-march-2021_GM406889139.pdf
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/pokemon-go-free-offers_GM1094591345.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/how-to-get-a-free-dominus-in-roblox_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/main/repository/how-to-get-minecraft-bedrock-edition-on-pc-for-free_GM479516143.pdf
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/inspect-element-roblox-hack-2021_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/pokemon-go-free-raid-pass_GM1094591345.pdf
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/coin-master-free-spins-ios_GM406889139.pdf
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/how-to-get-free-robux-legit-august-20_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/main/repository/minecraft-windows-free_GM479516143.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/pubg-uc-u-mobile_GM1330123889.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/robux-earning-sites_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/main/repository/minecraft-free-download-chromebook_GM479516143.pdf
    • http://lib.bppsdmp.pertanian.go.id/main/repository/how-to-hack-a-roblox-account-with-cheat-engine_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/camping-2-hacks-roblox_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/haktuts-coin-master-free-spins-2021_GM406889139.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/roblox-parkour-script-hack_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/main/repository/coin-master-hack-2021-android-apk_GM406889139.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/free-minecraft-codes-2021_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005265.bin
8ffb385ad5de512674aa709feb914bee9d3556a99cba929252fc34a0f1774092		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5265 25208 bytes
font_01_sfnt_off00008bcb.bin
9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BCB 5596 bytes
font_02_sfnt_off00009872.bin
35434cd352e3ea6919e4a043b66670872933491e92289eb7449564da724ec2c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9872 19320 bytes

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