Malicious PDF — malware analysis report

Static analysis result for SHA-256 9028c857828f9f0c…

MALICIOUS

PDF

34.0 KB Created: 2021-06-23 02:49:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 3933d39bf22c3707d58e55e61aafa89e SHA-1: 1e26a0215a84eb15dfdffeec6c9e19f2f6b29c0d SHA-256: 9028c857828f9f0ca0c56e8bead0b28ebb44a5a097eb74df6b24e072f2ef257c
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links disguised as game hacks and generators, aiming to trick users into visiting malicious websites. The primary lure is 'how to hack someones roblox password', directing users to http://netcdn.co/app/431946152/how-to-hack-someones-roblox-password-game-hack. The document also hosts a large number of SEO-optimized PDF links, likely for link farming or to distribute further malicious 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-to-hack-someones-roblox-password-game-hack In PDF document text
    • https://kierowcyhgv.uk/images/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://kierowcyhgv.uk/images/cheat-in-roblox-rocitizens-money_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/get-free-robux-info_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/free-tiktok-followers-no-human-verification_GM835599320.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://kierowcyhgv.uk/images/roblox-server-free-app_GM431946152.pdfIn PDF document text
    • http://kierowcyhgv.uk/images/roblox-speed-hack-jailbreak_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/how-to-get-free-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • http://kierowcyhgv.uk/images/how-do-u-trade-someone-for-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://kierowcyhgv.uk/images/how-to-get-free-robux-with-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://kierowcyhgv.uk/images/roblox-cheat-engine-64-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/coin-master-hack-spin-ios_GM406889139.pdfIn PDF document text
    • http://kierowcyhgv.uk/images/roblox-free-codes-on-toys_GM431946152.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_off00002f04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F04 21584 bytes
SHA-256: 4dc3032d941194eac3fc9e763bbca946ab61fc3f752cff9b890568b4ee6924ba
font_01_sfnt_off00005e98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E98 19408 bytes
SHA-256: 34500999926e4cefb1c48e3943c063e5ee0c2699671562c444ce2301f4a52a0c

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