Malicious PDF — malware analysis report

Static analysis result for SHA-256 578af9491b20a49c…

MALICIOUS

PDF

45.5 KB Created: 2021-06-02 16:34:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9c40f7cd7ef6c7ed4165d8e82f944ad7 SHA-1: 8119e84057063a648b41308a9086989332109747 SHA-256: 578af9491b20a49c4c47c25bffeb7e6bf85b59dc454f4cde316abca1400c35b3
220 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links, specifically advertising 'free generator / game hack' lures. The embedded URL and document body content reinforce this, directing users to a site promising game hacks. This suggests a phishing or scam attempt designed to redirect users to potentially malicious content or further phishing pages.

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.xyz/app/431946152/robux-hack-without-installing-apps-game-hack In PDF document text
    • http://ipdrs.org/images/coin-master-hacks-android_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/coin-master-free-spin-software_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/20210-free-spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/free-modded-minecraft-server_GM479516143.pdfIn PDF document text
    • http://ipdrs.org/images/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/how-to-change-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/how-to-get-more-followers-on-tiktok-free_GM835599320.pdfIn PDF document text
    • http://ipdrs.org/images/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://ipdrs.org/images/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/coin-master-hack-ios-2021_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_off00004e77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E77 27268 bytes
SHA-256: d7ad304b8e2504f5c7d239c3ccd002c43368709c97e7c58d28f08cbb3f7c254b
font_01_sfnt_off00008be1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BE1 19372 bytes
SHA-256: 77120ee2e0c6ee11ff426783cfde9cdb03de7d4d5d63d403ab31cd31fc799116