Malicious PDF — malware analysis report

Static analysis result for SHA-256 affa4ce97079147c…

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 20:32:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: dba02532efbd162e52c0eb8053173089 SHA-1: 3ed9d17eb2c32d4599d7584444ff76854a6d56b2 SHA-256: affa4ce97079147ca8f3f750217790c2fa1aa9ee281f8cfe530b60f7c7480b7c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting 'free Robux' and game hacks. The document body and embedded links suggest a social engineering lure designed to trick users into visiting malicious websites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or scam attempt.

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/how-to-win-free-robux-game-hack In PDF document text
    • http://lib.akper17.ac.id/repository/trustworthy-free-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-to-get-free-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-to-get-free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/can-you-take-templates-from-roblox-free_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/coinmasterfree_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/coin-master-35-16-hack-apk_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/hack-master-coin_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/pokemon-go-free-year_GM1094591345.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/coin-master-cards-free-cards_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/coin-master-hack-download-android_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/coin-master-spins-free-2021_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-roblox-followers_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-coins-for-coin-master_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_off00003138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3138 22228 bytes
SHA-256: 7d892de63a4aa327ae1a05841a96a7563619d6d4dcd4cd6bbb80032468cba1e0
font_01_sfnt_off00006262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6262 19196 bytes
SHA-256: d4de8ba3bb8760068d37a29e92514803f273f6f34b8f58488b1b99838233901d

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