Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3d64662f4ea18ae…

MALICIOUS

PDF

40.9 KB Created: 2021-05-19 23:05:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ba62e48da375832f4c366aeba31b2b4a SHA-1: d62313d0c63ecd609635340e546446cdf45ddb69 SHA-256: e3d64662f4ea18aee1e51ffd566bd825e3d5d3967f7cd804b20374922b0e9d52
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs that form a link farm, directing users to sites offering game hacks and cheats. The ML classifier and PDF heuristics strongly indicate malicious intent, likely to trick users into downloading malware or engaging in phishing. The document body, though partially corrupted, contains references to game cheats and a primary URL, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/free-coins-coin-master-spins-game-hack
    • http://infoagronomia.com.ar/images/coin-master-hack-program_GM406889139.pdf
    • http://infoagronomia.com.ar/images/hey-google-how-do-you-get-free-robux_GM431946152.pdf
    • http://infoagronomia.com.ar/images/coin-master-spin-hack-2021_GM406889139.pdf
    • http://infoagronomia.com.ar/images/coin-master-free-spins-hack-apk-download_GM406889139.pdf
    • http://infoagronomia.com.ar/images/how-to-get-minecraft-java-free_GM479516143.pdf
    • http://infoagronomia.com.ar/images/coin-master-gold-cards-hack_GM406889139.pdf
    • http://infoagronomia.com.ar/images/coin-master-hack-2021-download_GM406889139.pdf
    • http://infoagronomia.com.ar/images/roblox-accounts-for-sale-free_GM431946152.pdf
    • http://infoagronomia.com.ar/images/picture-roblox_GM431946152.pdf
    • http://infoagronomia.com.ar/images/coin-master-free-spins-android_GM406889139.pdf
    • http://infoagronomia.com.ar/images/coin-master-fun-hack-online_GM406889139.pdf
    • http://infoagronomia.com.ar/images/is-there-a-way-to-get-free-robux_GM431946152.pdf
    • http://infoagronomia.com.ar/images/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdf
    • http://infoagronomia.com.ar/images/how-to-get-free-cards-in-coin-master_GM406889139.pdf
    • http://infoagronomia.com.ar/images/robuxlove-net-free-robux_GM431946152.pdf
    • http://infoagronomia.com.ar/images/how-to-get-more-robux_GM431946152.pdf
    • http://infoagronomia.com.ar/images/free-roblox-outfits_GM431946152.pdf
    • http://infoagronomia.com.ar/images/100-free-spins-coin-master_GM406889139.pdf
    • http://infoagronomia.com.ar/images/coin-master-hack-no-survey-2021_GM406889139.pdf
    • http://infoagronomia.com.ar/images/how-to-get-free-robux-2021-easy_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000492e.bin
3fb2cc39f7a6ead86351ff00f5da60dcc4fcc011fab6eddfebf63108e1674fd4
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x492E 23852 bytes
font_01_sfnt_off00007e77.bin
2acdf213e8e807bc487a80aadd43e8577e55ab076d243b65afc8816f4882cfa2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E77 17884 bytes