Malicious PDF — malware analysis report

Static analysis result for SHA-256 61848e442c1bef98…

MALICIOUS

PDF

34.2 KB Created: 2021-07-03 22:07:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 0acb545eec3dfef16c3860692f047862 SHA-1: 3599ac5dc93bd649492adafee1944022d91318f8 SHA-256: 61848e442c1bef98fc5b47d3b48bef06122969fa55130be2bedcf0dea31d3ee5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure related to free virtual currency and game hacks, directing users to a known malicious redirector. The embedded URLs and document content strongly suggest a phishing or scam attempt designed to lead the user to potentially malicious websites. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a high likelihood of malicious redirection, potentially leading to further exploitation or credential harvesting.

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/hex-number-gives-free-robux-by-robuxian-game-hack In PDF document text
    • http://lib.kunci.or.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-gold-cards-link-2021ee-spins_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-at-http-get-robux-eu5-net_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/hacks-for-mad-city-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-cheat-command-code_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-free-role-high_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/weird-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/aprender-a-hackear-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/100-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-working-hack_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/robux-free-online_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-robux-cheat-youtube_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-coin-master-spins_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_off00002f73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F73 21892 bytes
SHA-256: 085e970af6b4219c160ffeb065eb093a5f7cbb25e1ae9a990e0eb24f41fc2a8f
font_01_sfnt_off00005fd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD2 19392 bytes
SHA-256: 9d48ecc2882b6036fca812946e24ef2e97ba2d2537c8e4d227f5c28eabc28a20

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