Malicious PDF — malware analysis report

Static analysis result for SHA-256 c706876e1ad75791…

MALICIOUS

PDF

44.8 KB Created: 2021-06-09 00:04:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 68068e11fac399ea9fe16ce7b58f3bb2 SHA-1: d8d15e0df6a444a877cc716b961c75f479aa237c SHA-256: c706876e1ad757910a1cb56311dff9a5d4a48d0de011836beb5250a218a6a729
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free Robux' or 'game hacks'. The document body and heuristics indicate a lure to a redirector URL, likely to download further malware or phish for credentials. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/how-to-instantly-get-free-robux-in-roblox-oprewards-game-hack In PDF document text
    • http://digilib.uim.ac.id/repository/how-to-hack-roblox-for-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/150-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-roblox-groups-with-funds-2021_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-coins--spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coins-master_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-hack-generator-android_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/best-star-wars-maps-free-modeled-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-hack-facebook_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-roblox-accounts-generator_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-coins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-free-coins-today_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/pubg-uc-telegram_GM1330123889.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
stream_004_off00004fbb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FBB 25580 bytes
SHA-256: 0a5c0308280d955f13c5f91d8353023596ddbeab19ece1c8d9303bc6b73e6e3b
font_01_sfnt_off000089f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89F1 19116 bytes
SHA-256: e4954a1696faea8ff6421c4e9ec7e4d9c93f2edfa29c35ce2a51dc37d023c86a

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