Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3a7ceda9fc9d2e4…

MALICIOUS

PDF

36.6 KB Created: 2021-07-05 21:46:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c97264204b759f89530d0c4f027df008 SHA-1: 1f1002697ffc521371b9cd18c2690b9ad628f02b SHA-256: d3a7ceda9fc9d2e4ffe291fb32c1b7441f676e90d9f82b2ff7c462bbcd6af449
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links designed to lure users with promises of game hacks and free in-game currency, redirecting them through malicious infrastructure. The document body and heuristics indicate a clear intent to drive traffic to external sites, likely for phishing or malware distribution. No scripts were extracted, but the extensive link farm and redirector usage strongly suggest a malicious workflow.

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.tw/app/431946152/adopt-me-roblox-hacks-game-hack In PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-minecraft-windows-10-with-java_GM479516143.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-foxy-food-coin-master_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-get-free-robux-on-roblox-2021-fast_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/roblox-guess-the-famous-characters-answers-cheat-sheets_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/minecraft-ps4-code-free_GM479516143.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/minecraft-pocket-edition-mods-for-free_GM479516143.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/roblox-jailbreak-play-for-free-online_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/boku-no-roblox-free-vip-servers_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-get-free-pets-in-roblox-adopt-me_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/daily-coin-master-free-spin-apk_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/roblox-actual-free-robux_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/which-games-on-roblox-you-should-fly-hack-in_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-many-levels-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-get-free-pets-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/free-spins-on-coin-masters_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_off000035bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35BC 22964 bytes
SHA-256: aeb546cca7b3e68b3d7b58078bbe7b46b1ed97966e2ced51e72d7b88e3fc9137
font_01_sfnt_off0000694d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x694D 19308 bytes
SHA-256: 22934774863ac3be514f624650c183b4034f40a3033292b7237229c7ea0ab873

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