Malicious PDF — malware analysis report

Static analysis result for SHA-256 038ab071ee5f05b4…

MALICIOUS

PDF

44.5 KB Created: 2021-06-11 00:41:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5bd24ef602c5153cb8e7cbcd107ffc11 SHA-1: 445a4fab77b505090db6f6c910b668f1aa71458f SHA-256: 038ab071ee5f05b436a31b9cbfaee3e649275b8af3a075cbf6722a3af8744bdf
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many with SEO-like slugs related to game cheats and free items, indicating a phishing or scam attempt. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content, likely as part of a broader phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • 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/431946152/10-awesome-free-roblox-outfits-game-hack
    • http://library.yamasi.ac.id//repository/free-spin-coin-master-hack-2021_GM406889139.pdf
    • http://library.yamasi.ac.id//repository/fan-page-coin-master_GM406889139.pdf
    • http://library.yamasi.ac.id/repository/play-coin-master-for-free_GM406889139.pdf
    • http://library.yamasi.ac.id/repository/roblox-parkour-point-hack-scriot_GM431946152.pdf
    • http://library.yamasi.ac.id/repository/free-robux-codes_GM431946152.pdf
    • http://library.yamasi.ac.id/repository/free-card-link-coin-master_GM406889139.pdf
    • http://library.yamasi.ac.id/repository/coin-master-free-spins-reddit_GM406889139.pdf
    • http://library.yamasi.ac.id//repository/coin-master-spin-hack-link_GM406889139.pdf
    • http://library.yamasi.ac.id//repository/roblox-fun-com-free-robux_GM431946152.pdf
    • http://library.yamasi.ac.id/repository/coin-master-32-android-mod-hack-apk-download_GM406889139.pdf
    • http://library.yamasi.ac.id/repository/coin-master-hack-account_GM406889139.pdf
    • http://library.yamasi.ac.id//repository/roblox-zone-free-robux_GM431946152.pdf
    • http://library.yamasi.ac.id//repository/coin-master-free-spins-2021-no-human-verification_GM406889139.pdf
    • http://library.yamasi.ac.id/repository/roblox-redeem-card-codes-free_GM431946152.pdf
    • http://library.yamasi.ac.id//repository/rbx-hut-promo-codes_GM431946152.pdf
    • http://library.yamasi.ac.id//repository/coin-master-free-spin-sites_GM406889139.pdf
    • http://library.yamasi.ac.id/repository/free-robux-not-fake-no-verification_GM431946152.pdf
    • http://library.yamasi.ac.id/repository/robux-free-online_GM431946152.pdf
    • http://library.yamasi.ac.id//repository/toolbox-for-minecraft-pe-mod-apk_GM479516143.pdf
    • http://library.yamasi.ac.id/repository/free-exploits-for-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005096.bin
8454950f0050a9eabf5aa805dd551c004524766ef51674ce901af55519b8318c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5096 25268 bytes
font_01_sfnt_off0000892b.bin
708bf1a24f42b069deca968fca172e15cbfded8aa7e001c94a3405bacdfe2396		 pdf-font-stream PDF embedded font (sfnt) at offset 0x892B 19016 bytes

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