Malicious PDF — malware analysis report

Static analysis result for SHA-256 da1eb2d2f0575797…

MALICIOUS

PDF

35.1 KB Created: 2021-06-20 09:40:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 315fcffeeedd2998dcbb6fc3d816dcb8 SHA-1: fe3fb016e816db92554b91d78b530322327d80fa SHA-256: da1eb2d2f0575797e9ac41127cc655823d90f50cdceb15086ada3f4b6317f0a7
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links designed to lure users into clicking on them, promising free in-game currency and hacks for popular games like Roblox and Coin Master. These links lead to a redirector and a large number of other PDF files, suggesting a link farm or SEO poisoning tactic to drive traffic to potentially malicious sites. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to external, potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/how-do-you-get-free-robux-2021-game-hack In PDF document text
    • https://de-licht.com/image/data/files/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdfIn PDF document text
    • https://de-licht.com/image/data/files/how-to-hack-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
    • https://de-licht.com/image/data/files/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://de-licht.com/image/data/files/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/how-to-get-coins-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • https://de-licht.com/image/data/files/robuxmatchcon_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/is-it-possible-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://de-licht.com/image/data/files/how-to-change-your-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/coin-master-free-spins-link-may-2021_GM406889139.pdfIn PDF document text
    • https://de-licht.com/image/data/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • https://de-licht.com/image/data/files/roblox-cheat_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/free-robux-quiz_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/hack-coin-master-apk-33_GM406889139.pdfIn PDF document text
    • https://de-licht.com/image/data/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://de-licht.com/image/data/files/roblox-jailbreak-hack-download-noclip_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/coin-master-hack-app-download-free_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_off00002ee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EE4 22712 bytes
SHA-256: 9ea4bf542e8b6bfe8d5b6689d1b2184322d93876c81bf468ab5f74ed0c21592f
font_01_sfnt_off000061f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F4 19716 bytes
SHA-256: 0d2f3942e55245e7a14fdb54ac7cb42d00cb555bb8e9738c839b3f9835dfd221

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