Malicious PDF — malware analysis report

Static analysis result for SHA-256 4332556afc8fd8d3…

MALICIOUS

PDF

34.7 KB Created: 2021-07-04 07:10:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8a44eb8c7b6addad6e42df3bafdac653 SHA-1: c7e078f8028dd954f228fb3cfdbf315ea10ab7c7 SHA-256: 4332556afc8fd8d34395a4ee5e892a4029963b1a5cc5d7855f299e40a3eeb284
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting 'game hacks' and 'free spins' lures. The ML classifier strongly indicated maliciousness, and the embedded URLs are designed to trick users into visiting potentially harmful sites. No scripts were extracted, but the document's structure and embedded URLs 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/406889139/monttechscom-coin-master-free-spins-game-hack In PDF document text
    • http://katalog.ireyogya.org/repository/free-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-games-no-verification_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-you-hack-on-roblox-assassin_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/dll-hack-roblox-phantom-forces_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-views-on-tiktok_GM835599320.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/robux-hack-robuxian_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-free-spins-link-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/omplete-surveys-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-time-hack-ios_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/tiktok-viewer-free_GM835599320.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/everything-free-in-roblox-catalog_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/hack-roblox-with-cheat-engine-64_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/pokemon-go-free-bonus-box_GM1094591345.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-blood-of-iron-hack_GM431946152.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_002_off00002f8a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F8A 23312 bytes
SHA-256: e47d8d7cf18d02cad16433890fd434cfab2937c824d9aca90232d0d8ec4bba04
font_01_sfnt_off0000643f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x643F 18600 bytes
SHA-256: cf10e1c73b91a9057371485db9e41fdbd99a25db1637158c8a65784560ead965

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