Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ab412fc66687844…

MALICIOUS

PDF

34.8 KB Created: 2021-07-03 13:49:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 40eff717d183da43cd03e5665ac8829a SHA-1: ce175cdd5b1e85712301e8f1e929ddbf6bd7266f SHA-256: 2ab412fc666878448c23bc4e65921b72348c894792e08c6cda83ce370c2c2f49
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are hosted on `my-travel.com.hk` and promote 'free Robux' or game hacks. The ML classifier strongly indicates maliciousness, and the structure suggests a link farm designed to redirect users to potentially malicious content or scams. No scripts were extracted, but the embedded URLs and the PDF_SEO_LINK_FARM heuristic point to a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/free-robux-websites-that-actually-work-game-hack PDF link annotation
    • http://www.my-travel.com.hk/upload/files/free-robux-net_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/its-free-real-estate-roblox_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/hack-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/pokemon-go-gameplay-free-online_GM1094591345.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/hack-naruto-final-bonds-roblox_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-hack-pro-gamers-com_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/be-a-parkour-ninja-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/redeem-roblox-card-free_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-spins-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/how-to-get-free-12-th-roblox_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/bhop-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/how-to-hack-roblox-to-get-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-hack-spin-160-pro_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30A0 21964 bytes
SHA-256: 6fb7f757a1009722618af813230228ab66cc24d4bdefd742c5e10efacf91918d
font_01_sfnt_off000060fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60FD 19728 bytes
SHA-256: c48ee832210ee305b2cdd7fb716127036f9f71975271ebe5eb06913399feca35

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