Malicious PDF — malware analysis report

Static analysis result for SHA-256 b590e79775d7b850…

MALICIOUS

PDF

45.0 KB Created: 2021-05-12 05:08:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 4708b98edf14ea07a8c9c7606deb55c7 SHA-1: 1dde9f25f98039fa0e976d7f9d4cc61ed14c0ef7 SHA-256: b590e79775d7b85089a4716e060e0fc71eb6881628cc8e81c66c358777d14ce0
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, including one pointing to a known malicious redirector infrastructure. The document body and heuristics indicate a lure for 'game hacks' or 'free generators', suggesting a social engineering tactic to drive users to malicious sites. The presence of a large number of external PDF links further supports the classification as a link farm, likely for SEO manipulation or distributing 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 https://netcdn.xyz/app/479516143/download-minecraft-bedrock-game-hack In PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/minecraft-bedrock-edition-pc-free_GM479516143.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/flip-master-free-coins_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/free-coin-spin-daily-link-net_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/roblox-microsoft-rewards_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/synapse-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/toolbox-for-minecraft-pe-mod-apk_GM479516143.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/coin-master-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/free-redeem-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/hack-coin-master-343-apk_GM406889139.pdfIn PDF document text
    • https://education.minecraftIn 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
stream_003_off00004d65.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D65 27684 bytes
SHA-256: b9090beeefe796000d7e685394c9b1b084ca65707ddb023dd3614c8b9f275641
font_01_sfnt_off00008c82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C82 18676 bytes
SHA-256: 7f86fed3984d6e1feedcbbb61174a74a8b6ed0af1ebcb464883137ac5d5df4fe

Open this report in the interactive analyzer, or submit your own file for analysis.