Malicious PDF — malware analysis report

Static analysis result for SHA-256 9243a1ab38610749…

MALICIOUS

PDF

43.2 KB Created: 2021-05-11 15:01:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 2bd920469d23d05bf244b790c8e3f5c3 SHA-1: 31595a0b72332f80ba871b5820951dd397bcc73b SHA-256: 9243a1ab386107492ab4eeece95a74e6d5aa47996614d1671e4d265f6a500010
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links and a visible call-to-action button, designed to trick users into clicking. The primary link redirects to malicious infrastructure known for hosting scam content, specifically related to game hacks and free currency. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest a phishing or scam attempt, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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-coins-and-spins-coin-master-game-hack In PDF document text
    • https://www.air-shop.cz/images/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.air-shop.cz/images/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • https://www.air-shop.cz/images/coin-master-spins-free-2021_GM406889139.pdfIn PDF document text
    • https://www.air-shop.cz/images/coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://www.air-shop.cz/images/omplete-surveys-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.air-shop.cz/images/minecraft-18-9-hacked-client_GM479516143.pdfIn PDF document text
    • https://www.air-shop.cz/images/coin-master-hacks-reddit_GM406889139.pdfIn PDF document text
    • https://www.air-shop.cz/images/free-role-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.air-shop.cz/images/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://www.air-shop.cz/images/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.air-shop.cz/images/coin-master-today_GM406889139.pdfIn PDF document text
    • https://www.air-shop.cz/images/mcpe-hack-client_GM479516143.pdfIn PDF document text
    • https://www.air-shop.cz/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.air-shop.cz/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.air-shop.cz/images/robux-rewards_GM431946152.pdfIn PDF document text
    • https://www.air-shop.cz/images/coin-master-cheat-engine-hack_GM406889139.pdfIn PDF document text
    • https://www.air-shop.cz/images/free-coins-for-coin-master-blogger_GM406889139.pdfIn PDF document text
    • https://www.air-shop.cz/images/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • https://www.air-shop.cz/images/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.air-shop.cz/images/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000478d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x478D 23916 bytes
SHA-256: 28cbdfae708dcc3be8b614b21cef2fcea8c213702921c3f538d6ea6c81dab925
font_01_sfnt_off00007d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D3E 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000086ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86EF 18060 bytes
SHA-256: f1068137021f01f6b5cc3550273fdf5362b49e27ffe305b66dd7920a08d48120

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