Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b849273c517d7f1…

MALICIOUS

PDF

47.1 KB Created: 2021-05-15 06:45:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: caf820651b33c3b21c6d3befe28ace8c SHA-1: 013c24754890f34432f1eafb6391927faa0fce3f SHA-256: 0b849273c517d7f1596846643b4a795c795a4da44423def87ff551339b978f7a
260 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF document contains numerous links designed to lure users to external websites. The primary link, 'https://netcdn.xyz/app/431946152/best-free-roblox-executor-game-hack', is identified as a malicious redirector and a lure for game hacks and potentially credential phishing, impersonating brands like Microsoft. The document also hosts a large number of other PDF links, suggesting a link farm or SEO manipulation tactic to drive traffic to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/431946152/best-free-roblox-executor-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/431946152/best-free-roblox-executor-game-hack In PDF document text
    • http://lakeshistory.com/images/master-game_GM406889139.pdfIn PDF document text
    • http://lakeshistory.com/images/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://lakeshistory.com/images/free-roblox-toy-codes-not-used_GM431946152.pdfIn PDF document text
    • http://lakeshistory.com/images/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • http://lakeshistory.com/images/free-coin-master-androd-cheats-2021_GM406889139.pdfIn PDF document text
    • http://lakeshistory.com/images/2021-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://lakeshistory.com/images/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lakeshistory.com/images/coin-master-for-pc-free-download_GM406889139.pdfIn PDF document text
    • http://lakeshistory.com/images/150-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lakeshistory.com/images/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://lakeshistory.com/images/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://lakeshistory.com/images/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://lakeshistory.com/images/oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • http://lakeshistory.com/images/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://lakeshistory.com/images/can-i-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://lakeshistory.com/images/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lakeshistory.com/images/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://lakeshistory.com/images/https-rbx-place-rewards_GM431946152.pdfIn PDF document text
    • http://lakeshistory.com/images/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lakeshistory.com/images/free-robux-websites-that-work_GM431946152.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_off000049a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49A4 26916 bytes
SHA-256: 4b5baff74542bd7b0a76876b88ac70a8cf4cdd334f6ee5608c3f6a6fbe5a34f8
font_01_sfnt_off00008904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8904 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9616 18192 bytes
SHA-256: 733e9a0a0591b99c013d9411b1913d02d457623b74e1d64140f900850ee20a3c

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