Malicious PDF — malware analysis report

Static analysis result for SHA-256 a63843677e994326…

MALICIOUS

PDF

34.7 KB Created: 2021-06-18 11:57:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cac9f60ff6d0dc3ee85b12a30796855e SHA-1: e10128ce27387d435052f532b591d5ae87d5427a SHA-256: a63843677e994326fca1f98419c415fb9feae6247c5361822da2bed3dc44a92c
160 Risk Score

Malware Insights

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

This PDF document employs a lure of game hacks and free currency to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which in turn serves further malicious PDF files. The ML classifier strongly indicated maliciousness, and the document's content and embedded URLs align with a phishing or scam campaign.

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.co/app/431946152/how-to-hack-roblox-on-android-tablet-game-hack In PDF document text
    • http://korporacjaroma.pl/images/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/free-roblox-hair-to-wear_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/free-coin-master-spins-blogger_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/hack-avec-les-code-promo-roblox_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/how-to-get-all-items-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/free-100-robux_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/coin-master-cards-hack-2021_GM406889139.pdfIn PDF document text
    • http://korporacjaroma.pl/images/roblox-trolling_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/how-to-hack-roblox-accounts-on-ipad-2021_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://korporacjaroma.pl/images/coin-master-free-spins-daily_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_off00002f9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F9E 22944 bytes
SHA-256: 815fb8104b3de8791140d1078d06efc15453700fb897d0f2cb918cdd6a9b572f
font_01_sfnt_off00006294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6294 19032 bytes
SHA-256: 71dcd72c9ce4dbc3840510cc09387dc7a4ff70a59f819d2fc15b45b60246d404

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