Malicious PDF — malware analysis report

Static analysis result for SHA-256 0efe0f3d116a1675…

MALICIOUS

PDF

44.4 KB Created: 2021-05-11 02:46:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e47059ea915391305f0e4a1c286afaf1 SHA-1: f1e52f4e7b4553a7f9c9edad6cd5f2b9bb65c668 SHA-256: 0efe0f3d116a1675f68f7d7dda96992126384e10104fcd6cc7be8f0f542fe74b
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to websites that are identified as malicious redirectors or part of a link farm, specifically targeting users interested in game hacks and free in-game currency. The document body, though partially corrupted, contains references to 'Minecraft' and 'free PS4', reinforcing the lure. The presence of numerous PDF links suggests an attempt to distribute further malicious content or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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 https://netcdn.xyz/app/479516143/how-to-get-minecraft-for-free-on-ps4-2021-game-hack In PDF document text
    • http://www.copoint.co.uk/images/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/www-coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/robux-cheat_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/minecraft-free-version-pc_GM479516143.pdfIn PDF document text
    • http://www.copoint.co.uk/images/how-to-use-redstone_GM479516143.pdfIn PDF document text
    • http://www.copoint.co.uk/images/apps-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.copoint.co.uk/images/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
    • http://www.copoint.co.uk/images/robux-without-verification_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/coin-master-free-spin-link-twitter_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/free-coin_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/hack-coin-master-apk-ios_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/coin-master-gold-cards-free-2021_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/coin-master-free-spins-hacktman_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/hack-coin-master-apk_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
stream_003_off0000497b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x497B 24592 bytes
SHA-256: 16d3807766f2f2ae14f7fbb268cd4298f80549acbc711b4e76f04be3cc6f1e68
font_01_sfnt_off000080cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80CD 2820 bytes
SHA-256: 96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689
font_02_sfnt_off00008a6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A6D 18492 bytes
SHA-256: 59dadd7e4280a1ed716b01789963ead00ba75883d4e16a7974e6139f8c4f7ce5

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