Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa33492f08b86084…

MALICIOUS

PDF

34.6 KB Created: 2021-07-04 21:39:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 6edd0d00e15a718466356b27f32ac3a6 SHA-1: efa649f248f019f8ddc788c1f248b0e8ede05628 SHA-256: fa33492f08b860848ccf0a1e299e8c0fd9eacf247bee56e563090f0bc0d2bbea
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users into clicking on a "free generator / game hack" which redirects to malicious infrastructure. The document body and heuristics indicate a scam or phishing attempt, likely to deliver a secondary payload or lead to a credential harvesting page. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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/gold-card-coin-master-free-game-hack In PDF document text
    • https://opac.heritagejkt.org//repository/coin-master-game-hunters-club_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/rewards-roblox-com_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/how-to-get-free-knives-in-roblox-murder-mystery_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/roblox-free-gamepass-v3rmillion_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/real-coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/robux-today_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/how-to-get-free-robux-nicsterv-2021_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/iron-spider-roblox-free_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coin-master-hack-spin-link_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/dragon-ball-ultimate-roblox-max-stats-hack-2021_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/get-robux-free-legal_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/robux-gives-roblox-hacks-free-roblox_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/is-tiktok-free-on-app-store_GM835599320.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coin-master-hack-ios-jailbreak_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/roblox-free-clothes-template_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/free-robux-real_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/how-to-get-items-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/no-robux-for-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30CC 23188 bytes
SHA-256: a9c43d3ca7d763546fbc112c0f272904f560377776077b47f05efc3c6228bf25
font_01_sfnt_off000064d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64D0 18244 bytes
SHA-256: 05cc7fd6a8f10c4dfba6ff40d9d3f4aef54fa3ecf28edf08d99c23ba0c86cb17

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