Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d5748c8bae5a903…

MALICIOUS

PDF

45.6 KB Created: 2021-06-11 09:07:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 45856e38fb844ce85043674601ce5595 SHA-1: 0650d52f755323f6d68362cdb3e9cb2f38d48e6c SHA-256: 1d5748c8bae5a9030aab27fbc6c0599792945e90af185a57c1dcedef631946ba
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including a known malicious redirector, under the guise of offering free game-related generators and hacks. The document body and heuristics indicate a lure for free Robux and other in-game items, which is a common tactic for phishing or malware distribution. The embedded links likely lead to further malicious content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/how-to-get-free-robux-generator-no-survey-game-hack In PDF document text
    • https://www.manmed.info:443/images/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-get-followers-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-roblox-abs-t-shirt_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-free-spins--coins-2021_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-hack-roblox-safe_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-get-free-robux-2021-not-fake-ral-2021_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/minecraft-pc-download-free-full-version_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/download-free-roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/can-i-get-minecraft-for-free_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
font_00_sfnt_off000051ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51FF 26320 bytes
SHA-256: bfccacaa7ed2c0d03fec156b3cb1e90ad7c6f05b83fd91a8845f96855264f861
font_01_sfnt_off00008ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DDF 18804 bytes
SHA-256: 22085acaac997f693568057f3fcd2d2753bf357f9438fd5810dc898f3bc69723

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