Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5f9b427afc0c1c2…

MALICIOUS

PDF

34.2 KB Created: 2021-07-06 13:08:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 46df1816dc42633cb8ab2539b5d72b73 SHA-1: bda13067f212c47b7ecbe08eeafb6db07949d81f SHA-256: a5f9b427afc0c1c280f585bec39ab557f145bbdbc6a9638e401bf454f354c41c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a critical heuristic firing for a game hack redirector lure, directing users to the URL http://netcdn.tw/app/431946152/100-robux-game-hack. The document body also contains this URL, reinforcing the lure. The ML classifier also flagged this PDF with high confidence, indicating malicious intent. The primary attack pattern observed is a phishing lure for game-related cheats or currency.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/431946152/100-robux-game-hack In PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/roblox-toy-codes-free_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/descargar-hacks-para-roblox-2021-con-fly_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/https-iosgodscom-topic-20214coinmasterhack_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/block-best-robux_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/coin-master-free-spins-link-cheat_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/free-minecraft-mods-for-xbox-one_GM479516143.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/microsoft-bing-robux_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/coin-master-hack-for-android_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/how-to-get-everything-in-roblox-catalog-for-free_GM431946152.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_off0000306e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x306E 22036 bytes
SHA-256: 5ae27387de0976a879d2f242a197736145b871ef96a747e137e6b861185027c3
font_01_sfnt_off00006127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6127 18828 bytes
SHA-256: 119893438dfdee07160b20114d595d80c7b0a9a0af49c5fc1e20f3c535fc2fc3

Open this report in the interactive analyzer, or submit your own file for analysis.