Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d2ab500387eb6f8…

MALICIOUS

PDF

33.0 KB Created: 2021-06-18 13:56:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a351e3d85313eb5048ca4be95fbeffea SHA-1: 67d653db026391257babe632b81db83bf0560d5b SHA-256: 1d2ab500387eb6f88bb2da34718a28b31987ca606d4f83599cf3b9d048ca4bc9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as "game hacks" and "free generators". The primary malicious link identified is http://netcdn.co/app/431946152/unkown-cheat-roblox-exploit-game-hack. The document body and embedded URLs suggest a lure to trick users into downloading potentially unwanted or malicious software. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 4

  • 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.
  • 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/unkown-cheat-roblox-exploit-game-hack In PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/minecraft-bedrock-free-server-hosting_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/free-robux-with-no-serveys_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/get-free-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/coin-master-hack-apk-2021-ios_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/coin-master-fan-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/roblox-free-logo7_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/coin-master-free-spins-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/how-to-get-free-coins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/roblox-se-througth-all-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/how-to-play-coin-master_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_off00002a67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A67 22116 bytes
SHA-256: 66f50bd49449bce5c5bc15d207372a85ef33be356521370a31eaac44ec531f09
font_01_sfnt_off00005b3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B3D 19384 bytes
SHA-256: c7882116033191b96b8a1d8eaa241e318ac026bdc9ec7577121d4070f0e29c03

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