Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb32d5deee2871fa…

MALICIOUS

PDF

42.9 KB Created: 2021-05-17 09:00:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 955815104917dfb037acd728f791ad29 SHA-1: d6fa0141f9c288b6d8a702847218fd1e63b36810 SHA-256: cb32d5deee2871fa916ad327354f5db65c98fa38ff8035b75094b339b7f8fa15
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier strongly indicated maliciousness, and the document body contains a clear lure for free game items, directing users to a URL that likely hosts a payload. The presence of numerous similar URLs further supports a campaign distributing such lures. No scripts were extracted, but the PDF structure and embedded URLs suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/free-spins-coin-master-hack-2021-game-hack In PDF document text
    • https://lita-lb.org/images/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lita-lb.org/images/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://lita-lb.org/images/coin-master-hack-tool-access-online-generator_GM406889139.pdfIn PDF document text
    • https://lita-lb.org/images/hack-coin-master-android-2021_GM406889139.pdfIn PDF document text
    • https://lita-lb.org/images/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • https://lita-lb.org/images/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • https://lita-lb.org/images/level-coin_GM406889139.pdfIn PDF document text
    • https://lita-lb.org/images/minecraft-tower-defense-hacked_GM479516143.pdfIn PDF document text
    • https://lita-lb.org/images/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • https://lita-lb.org/images/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://lita-lb.org/images/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • https://lita-lb.org/images/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lita-lb.org/images/coin-master-hacks-reddit_GM406889139.pdfIn PDF document text
    • https://lita-lb.org/images/coin-master-hack-tool-for-pc_GM406889139.pdfIn PDF document text
    • https://lita-lb.org/images/how-to-get-stuff-that-cost-coins-free-mpe-master_GM406889139.pdfIn PDF document text
    • https://lita-lb.org/images/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://lita-lb.org/images/coinmaster-fan-page_GM406889139.pdfIn PDF document text
    • https://lita-lb.org/images/www-rubux_GM431946152.pdfIn PDF document text
    • https://lita-lb.org/images/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • https://lita-lb.org/images/coin-master-free-spins-link-2021_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_003_off00004b43.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B43 25176 bytes
SHA-256: 648c3bb3852696b7184f0893e03e48ee73e668a268e649fd9ff4c6d965f87cd2
font_01_sfnt_off000084b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84B1 18456 bytes
SHA-256: 8f74d6ddd2abce9f563610cbfcc253ce51c057807514da134dc64dcb58b7111e

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