Malicious PDF — malware analysis report

Static analysis result for SHA-256 a57d7586bd4c5120…

MALICIOUS

PDF

48.1 KB Created: 2021-06-08 16:53:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 212c2f953ed3a179caa313c20ed37d72 SHA-1: 66eb943be0dd8346f6fe5aec02c386a38264edde SHA-256: a57d7586bd4c51207c5867fd28238cf6a7e24cd54579bf9a603dd79b8dbf2b93
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a link farm heuristic indicates a large number of external links, suggesting a phishing or scam attempt. The document body mentions 'Roblox Free Gift Card Script' and 'game hack', aligning with the lure of free in-game currency or cheats. The presence of embedded URLs and the ML classifier's high confidence score support a malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 4

  • 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.
  • 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/roblox-free-gift-card-script-game-hack PDF link annotation
    • http://halitbayramoglu.com.tr/images/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/coin-master-shield-hack_GM406889139.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/weird-roblox_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/install-free-game-coin-master_GM406889139.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/pubg-uc-17_GM1330123889.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/card-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/tiktok-free-like-bot_GM835599320.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/coin-master-instagram-free-spins_GM406889139.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/free-card-link-coin-master_GM406889139.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/roblox-royale-high-accessories-hacks_GM431946152.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://halitbayramoglu.com.tr/images/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e67.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E67 28584 bytes
SHA-256: 5caa530ecd1db1c44a64365d065b4037e0e035f1875a463dec51d6b68b841f9c
font_01_sfnt_off00008e18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E18 2888 bytes
SHA-256: dcdd98ee8e25436a83587ccb4027347dd2c3fcec95f3413942edd4086125bcca
font_02_sfnt_off000097ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97EC 18752 bytes
SHA-256: b1bc4b3383629dd8e42fa5f227664c87bcf80c01b44aafcbff1745c16300801d

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