Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d428cd3a616a90a…

MALICIOUS

PDF

46.3 KB Created: 2021-05-11 12:39:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 02d03140bb55d5d9c6550bb3e0863e45 SHA-1: 6ac70db852e03a758e05941e8896d1bb62d7f65e SHA-256: 7d428cd3a616a90ada540cb3838b8e087f1ffd36c3c0a04b84b4be67d8e7c329
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to websites offering game hacks and free currency, a common lure for phishing or malware distribution. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates these links point to known malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8696

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 https://netcdn.xyz/app/431946152/is-free-robux-real-game-hack In PDF document text
    • https://balibanknews.com/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • https://balibanknews.com/new/public/ckfinder/userfiles/files/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://balibanknews.com/new/public/ckfinder/userfiles/files/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://balibanknews.com/new/public/ckfinder/userfiles/files/coin-master-hack-program_GM406889139.pdfIn PDF document text
    • https://balibanknews.com/new/public/ckfinder/userfiles/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://balibanknews.com/new/public/ckfinder/userfiles/files/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • https://balibanknews.com/new/public/ckfinder/userfiles/files/coin-master-hack-online-cheat_GM406889139.pdfIn PDF document text
    • https://balibanknews.com/new/public/ckfinder/userfiles/files/coin-master-hack-apk-android_GM406889139.pdfIn PDF document text
    • https://balibanknews.com/new/public/ckfinder/userfiles/files/getrobux-now_GM431946152.pdfIn PDF document text
    • https://balibanknews.com/new/public/ckfinder/userfiles/files/roblox-devil_GM431946152.pdfIn PDF document text
    • https://balibanknews.com/new/public/ckfinder/userfiles/files/latest-free-spin-coin-master-daily_GM406889139.pdfIn PDF document text
    • https://balibanknews.com/new/public/ckfinder/userfiles/files/coin-master-free-card-link-today_GM406889139.pdfIn PDF document text
    • https://balibanknews.com/new/public/ckfinder/userfiles/files/coin-master-free-coins-link-facebook_GM406889139.pdfIn PDF document text
    • https://balibanknews.com/new/public/ckfinder/userfiles/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://balibanknews.com/new/public/ckfinder/userfiles/files/roblox-rules_GM431946152.pdfIn PDF document text
    • https://balibanknews.com/new/public/ckfinder/userfiles/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://balibanknews.com/new/public/ckfinder/userfiles/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://balibanknews.com/new/public/ckfinder/userfiles/files/coin-master-32-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://balibanknews.com/new/public/ckfinder/userfiles/files/minecraft-windows-10-hack-client-2021_GM479516143.pdfIn PDF document text
    • https://balibanknews.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-hack-2021_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_003_off00004c0a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C0A 26068 bytes
SHA-256: ead53ddba6434204700a490dd2cfab9ffc2d3944bda865f6b400b3e8a4abbe58
font_01_sfnt_off00008862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8862 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000924c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x924C 18316 bytes
SHA-256: 9bdcdb8e91d3ea0453a36ee7825602dfd4ad5462dbe9555a8ca018b76ca04954