Malicious PDF — malware analysis report

Static analysis result for SHA-256 81927a407f64b42d…

MALICIOUS

PDF

34.4 KB Created: 2021-06-18 10:00:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6bfb1462b062b6a711f04c66de468145 SHA-1: 5d5bf8dab02144ba85bc0abdc88f087ce1c5c1ba SHA-256: 81927a407f64b42d3dc51b020647ca5e34ac37c4c96d3a98fb2084d182e4384b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a known malicious redirector, masquerading as a generator for game hacks and cheats. The document body and heuristics indicate a lure for free in-game items or cheats, which is a common social engineering tactic. The primary malicious URL identified is http://netcdn.co/app/431946152/roblox-jailbreak-cheat-engine-2021-game-hack, which likely serves as a gateway to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/roblox-jailbreak-cheat-engine-2021-game-hack In PDF document text
    • https://pustaka.widyakartika.ac.id/repository/guuud-info-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-free-coins-and-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/como-poner-hacks-en-roblox-cs-go_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-hack-apk-ios_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-dantdm-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-free-pin_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-hack-coin-master-root_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/is-minecraft-vr-free_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-pc-version-free-download_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-coin-master-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-and-spin_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/arianagrande-break-free-roblox-music-id_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coinmasterfree_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-free-spins-twitter_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-rewards-roblox_GM431946152.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_off00002e6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E6B 22176 bytes
SHA-256: 667766e8ea78cffd635f5b6fdfec208137cf85ba9c47e3468a43d8feab12332b
font_01_sfnt_off00005f90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F90 19612 bytes
SHA-256: 9e525d32074c617778ec297e95f3ac16c39c18f475c0938a812a516fa93839a2

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