Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1462329fae08c81…

MALICIOUS

PDF

46.5 KB Created: 2021-06-03 23:57:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d33f15366f1845c2c52a78fee8f93f39 SHA-1: bfb5d2dc5d6ae0fa07ca5b5b8a4fdaa27fba7ba5 SHA-256: a1462329fae08c8121cd5a6872ccd10bfc81d87295fd61e6e9c836f12c2da52a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators' for popular games. The document body and heuristics indicate a lure designed to trick users into visiting these malicious URLs. No scripts were extracted, but the presence of multiple malicious redirector links strongly suggests a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.online/app/431946152/my-roblox-account-was-hacked-game-hack In PDF document text
    • http://lib.fekon.untad.ac.id/repository/daily-coin-master-free_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-mod-version-free-download-34-4_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/roblox-online-free_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-hack-apk-facebook-login_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/fan-page-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/roblox-download-pc-free_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-100-robux_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-flip-master-coins_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
stream_004_off00004f03.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F03 28728 bytes
SHA-256: 2d50b2072e4a9007d8fb08c1704a8271e333eed885d7c10ffcc7eab3625f0ba4
font_01_sfnt_off00009079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9079 19176 bytes
SHA-256: ffd13423bb2d32432d99d8a895d46ab03e3902ef9e73634024ba4176c0f3d041

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