Malicious PDF — malware analysis report

Static analysis result for SHA-256 36db26eb73dc30f0…

MALICIOUS

PDF

35.5 KB Created: 2021-07-05 22:14:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6755acfeb06b1fd5d721c1f587dd3c90 SHA-1: 4fdd606afa3f8c36f370354efa5ae6cd8c6fb621 SHA-256: 36db26eb73dc30f00c2a4e280d2e2c72f47cd8954c56f61ab2ac41dd4c4e234b
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains multiple embedded URLs and a prominent link in the body text, all related to free in-game currency and cheats for games like Coin Master and Roblox. The presence of a 'download button' lure and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites. No scripts were extracted, but the overall pattern suggests a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-daily-free-spins-link-haktuts-game-hack
    • http://www.6636.com.tw/ad6636/upload/files/latest-coin-master-free-spins-link_GM406889139.pdf
    • http://www.6636.com.tw/ad6636/upload/files/free-robux-press-g_GM431946152.pdf
    • http://www.6636.com.tw/ad6636/upload/files/download-free-roblox-clothes_GM431946152.pdf
    • http://www.6636.com.tw/ad6636/upload/files/free-robux-master_GM431946152.pdf
    • http://www.6636.com.tw/ad6636/upload/files/is-roblox-free-on-nintendo-switch_GM431946152.pdf
    • http://www.6636.com.tw/ad6636/upload/files/free-nonwearedevs-roblox-exploit_GM431946152.pdf
    • http://www.6636.com.tw/ad6636/upload/files/get-free-robux-without-human-verification_GM431946152.pdf
    • http://www.6636.com.tw/ad6636/upload/files/roblox-robloxian-highschool-script-free-vip_GM431946152.pdf
    • http://www.6636.com.tw/ad6636/upload/files/free-robux-roblox-hack-no-survey-no-human-verification_GM431946152.pdf
    • http://www.6636.com.tw/ad6636/upload/files/quelqun-me-hack-sur-roblox-city_GM431946152.pdf
    • http://www.6636.com.tw/ad6636/upload/files/good-outfits-roblox-for-free_GM431946152.pdf
    • http://www.6636.com.tw/ad6636/upload/files/roblox-hack-download_GM431946152.pdf
    • http://www.6636.com.tw/ad6636/upload/files/roblox-ro-ghoul-hack_GM431946152.pdf
    • http://www.6636.com.tw/ad6636/upload/files/robux-fun-hack_GM431946152.pdf
    • http://www.6636.com.tw/ad6636/upload/files/coin-master-hack-app-android_GM406889139.pdf
    • http://www.6636.com.tw/ad6636/upload/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • http://www.6636.com.tw/ad6636/upload/files/descarga-de-roblox-hackeado-robux_GM431946152.pdf
    • http://www.6636.com.tw/ad6636/upload/files/hack-spray-paint-roblox-libary_GM431946152.pdf
    • http://www.6636.com.tw/ad6636/upload/files/how-to-get-free-robux-promo-codes-2021-august_GM431946152.pdf
    • http://www.6636.com.tw/ad6636/upload/files/how-do-you-get-free-robux-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000313c.bin
2313ebec733e3f80fd1ce707daf7902e8022929e40b46d1ea720595bde2a9eeb
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x313C 23416 bytes
font_01_sfnt_off0000666d.bin
49207483bf32a187d686184abb37293df08a73275c2ae3e393497f5d9b8f66e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x666D 18904 bytes