Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a5f6ac315e4cf81…

MALICIOUS

PDF

35.7 KB Created: 2021-06-27 16:19:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b348cfe35db244fe9bef679d8ab5d6df SHA-1: 90cffcb0b88764ebee663b3b97779503e650a051 SHA-256: 5a5f6ac315e4cf81fb2e46dd18dd91c47a155fde9d196ecd9260af687efe3ef7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including a known malicious redirector, masquerading as game hacks and free generators. The document body explicitly contains the URL http://netcdn.co/app/431946152/free-promo-codes-roblox-february-2021-game-hack, which is flagged as a lure for game hacks. The presence of these links and the ML classifier's high confidence indicate a malicious intent to redirect users to potentially harmful content.

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.co/app/431946152/free-promo-codes-roblox-february-2021-game-hack In PDF document text
    • https://7gking.tw/upload/files/get-free-robux-info_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/roblox-raindrop-free_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/free-robux-list_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/free-robux-generator_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/hacks-on-roblox-to-change-ur-look_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/ninja-zone-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/master-hack-coin_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/how-to-get-free-builders-club-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/hack-coin-master-apk-ios_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/c-face-free-roblox_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/how-to-hack-mcpe-master-coins_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/robux-hack-no-offers_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/free-minecraft-gift-card_GM479516143.pdfIn PDF document text
    • https://7gking.tw/upload/files/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/minecraft-dungeons-download-free_GM479516143.pdfIn PDF document text
    • https://7gking.tw/upload/files/how-to-get-a-free-hat-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/300-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3178 22568 bytes
SHA-256: 9d8ba292c3bdac576190d8b7028d748dc6edb3dae487b550525a057d4f738c1f
font_01_sfnt_off000063df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63DF 19960 bytes
SHA-256: dc87b1792d7e1044b0ffbeb5189f5c531466913807db29e189df08f83cd5616a

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