Malicious PDF — malware analysis report

Static analysis result for SHA-256 18836defa06408c0…

MALICIOUS

PDF

41.9 KB Created: 2021-05-11 03:33:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 1d90c98ed70266bfacde977b1c1917c9 SHA-1: 2ddd5ef8c318fafa2c32ba5efb7161f7bf2e7642 SHA-256: 18836defa06408c0784d9a60cec3ed46535eeeae74c452d22297a6facbd8f1ea
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links designed to redirect users to potentially malicious websites, masquerading as game hacks and generators. The presence of a malicious redirector link and a large number of SEO-optimized PDF links indicates a campaign to drive traffic to malicious infrastructure. No scripts were extracted, but the document's structure and embedded links strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/unlimited-coin-master-free-spins-game-hack In PDF document text
    • http://www.copoint.co.uk/images/coin-master-hack-tool-india_GM406889139.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-make-robux_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/coin-master-free-spins-and-coins-today-gift-reward_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/coin-master-hack-spin-generator_GM406889139.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/hack-coin-master-apk_GM406889139.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/hack-coin-master-apk-ios_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/how-do-you-get-free-robux-2021_GM431946152.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/www-coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/can-i-get-minecraft-for-free_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/how-to-get-infinite-robux_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/facebook-coin-master_GM406889139.pdfIn PDF document text
    • http://www.copoint.co.uk/images/microsoft-roblox-rewards_GM431946152.pdfIn PDF document text
    • http://www.copoint.co.uk/images/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.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_003_off0000479f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x479F 24840 bytes
SHA-256: 1047b53c072cc88722cbe20922323864e385178bc9a7118cdfd3124592d4e363
font_01_sfnt_off00008091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8091 18580 bytes
SHA-256: 8174e31e86101b13b9901149211171076a60a6b50e3f7464e0ceab7d787638aa

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