Malicious PDF — malware analysis report

Static analysis result for SHA-256 594698e70d1630fd…

MALICIOUS

PDF

36.0 KB Created: 2021-06-27 17:24:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: d652d998dd80ae5d7a9bc4b64ba80c93 SHA-1: 31322e5173e3db9f019f59526b1e0772b49199ac SHA-256: 594698e70d1630fd3e4d583c4afe0701651a04e51b2c01a2bb1c385a49d2a54e
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and a link farm, masquerading as a generator for game hacks and cheats. The primary lure is the URL http://netcdn.co/app/431946152/redline-roblox-cheat-download-give-me-the-fucking-cheat-rn-game-hack, which is associated with malicious redirector infrastructure. The document body and heuristics indicate a social engineering tactic to trick users into visiting these malicious sites, likely for further malware delivery or credential harvesting.

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/redline-roblox-cheat-download-give-me-the-fucking-cheat-rn-game-hack In PDF document text
    • http://lib.stie-aub.ac.id/repository/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-free-gamepasses-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-roblox-december-hack_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-without-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-hack-version-download-2021-android_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/casual-shirt-and-pants-for-girls-roblox-template-free_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-roblox-free-play_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/hack-money-roblox-lumber-tycoon-2_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-stealer_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/www-roblox-com-free-download_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/minecraft-wurst-client_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/donttazemebro-roblox-person-hes-a-hacker_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-use-cheat-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-free-robux-new_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-free-spins-link-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-spins-for-coin-master-on-1-19-19_GM406889139.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_off0000316a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x316A 22800 bytes
SHA-256: b6eb8f290367f148e8945b4ce53b26b4d791d26204e8e7f188921a63af99ea7e
font_01_sfnt_off00006463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6463 20168 bytes
SHA-256: 5cbb9d77b002585698a3cbbeb2f2822e227d31f3f4a6f30659b4e72353ed9366

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