Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b3c23d1b9922fbb…

MALICIOUS

PDF

32.5 KB Created: 2021-06-30 13:57:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 67dcd0200869d9827fca20c7f5833302 SHA-1: d3fb14c3e81f33c1c9cf66204474ce0bfcc3bbae SHA-256: 0b3c23d1b9922fbb73322801bf192b7dcf8b57369a024206f1ad030eadb18c10
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that point to redirectors, specifically advertising 'free generators' for games like Roblox and Coin Master. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate a malicious intent to trick users into visiting these links. No scripts were extracted, but the document body and heuristics strongly suggest a phishing or scam lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/free-download-roblox-mod-apk-game-hack In PDF document text
    • http://ghi.dk/billeder/free-roblox-to-play-right-now_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/roblox-catalog-free-robux_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/village-3-coin-master_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/dreadguard-roblox-hack_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/how-to-have-free-robux_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/coin-master-game-android-free-download_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/roblox-rewards_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/coin-master-freebies_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/roblox-how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/coin-master-free-gold-cards-link-2021ee-spins_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/unlimited-spin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/robux-hack_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/how-to-hack-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/coin-master-on-facebook_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_off00002897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2897 21712 bytes
SHA-256: 33c86ae8bc4fafe5ede7192938160faee55d04ca39542021a88bfac33af7f9f3
font_01_sfnt_off00005842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5842 19700 bytes
SHA-256: 766f278749ac1825c0a9e084ca65ce93f11aefdcd5cf76509f9850fcdba6b5eb

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