Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd05321865dbf92f…

MALICIOUS

PDF

48.3 KB Created: 2021-05-11 01:34:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: b5e3c5274dbf408711cd7bcdd43e66ee SHA-1: 54c1bdfbae5b14dc981812e10ceb32c09cc960ba SHA-256: bd05321865dbf92f3afc612e92b0ad58562c2850b37a1c5dd1ee7f84caf2fdbe
260 Risk Score

Malware Insights

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

This PDF document contains numerous links designed to lure users into clicking on them, masquerading as generators for game hacks and free currency. The primary redirector URL, https://netcdn.xyz/app/406889139/master-free-spin-and-coin-link-game-hack, is associated with malicious activity and brand impersonation, specifically Facebook. The document's structure and embedded links suggest an attempt to exploit user interest in free game items to achieve credential phishing or drive traffic to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8715

Heuristics 6

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/406889139/master-free-spin-and-coin-link-game-hack.
  • 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/master-free-spin-and-coin-link-game-hack In PDF document text
    • http://laboraltoledo.com/images/gold-cards-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://laboraltoledo.com/images/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://laboraltoledo.com/images/roblox-rules_GM431946152.pdfIn PDF document text
    • http://laboraltoledo.com/images/robloxhacks_GM431946152.pdfIn PDF document text
    • http://laboraltoledo.com/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://laboraltoledo.com/images/minecraft-pe-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://laboraltoledo.com/images/minecraft-pe-free-download-ios_GM479516143.pdfIn PDF document text
    • http://laboraltoledo.com/images/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://laboraltoledo.com/images/apps-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://laboraltoledo.com/images/coin-master-hack-mod-apk-android-1_GM406889139.pdfIn PDF document text
    • http://laboraltoledo.com/images/coin-master-free-cards-and-spin-link_GM406889139.pdfIn PDF document text
    • http://laboraltoledo.com/images/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://laboraltoledo.com/images/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://laboraltoledo.com/images/coin-master-free-in-app-purchases_GM406889139.pdfIn PDF document text
    • http://laboraltoledo.com/images/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://laboraltoledo.com/images/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://laboraltoledo.com/images/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://laboraltoledo.com/images/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://laboraltoledo.com/images/how-to-robux_GM431946152.pdfIn PDF document text
    • http://laboraltoledo.com/images/free-robux-today_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b1e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B1E 24172 bytes
SHA-256: 62602a0b7de54ce46260c0b4312ab4ec80348fe47e395b3199aaf6b0dbbe5c03
font_01_sfnt_off0000828b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x828B 4028 bytes
SHA-256: a17c2a746d49ac23b23e38a371e32fddecfcd91b10cf42ff6155bff6b8a07e91
font_02_sfnt_off0000902c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x902C 2788 bytes
SHA-256: 6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530
font_03_sfnt_off00009a1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A1C 18228 bytes
SHA-256: 4b57acba41aa68bb280b2f656de6400654b723400b96e238fbc94aea55036d0e

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