Malicious PDF — malware analysis report

Static analysis result for SHA-256 35d9bf5dd41bcde3…

MALICIOUS

PDF

33.9 KB Created: 2021-07-05 13:55:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 444a553293949d3b06438f25fccc1419 SHA-1: 32a3a6bca91974e2a7aa496e715c8b6c7b192431 SHA-256: 35d9bf5dd41bcde3ae4a932f1fbddfd5a5e7162448c1fa1c56615f74d391bfb6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, masquerading as "free generators" or "game hacks" for popular games. The primary lure URL is http://netcdn.tw/app/431946152/bloxland-earn-free-robux-game-hack, which is designed to trick users into clicking through to potentially harmful content. The document body and embedded URLs strongly suggest a social engineering tactic to drive traffic to malicious sites.

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.tw/app/431946152/bloxland-earn-free-robux-game-hack In PDF document text
    • http://katalog.stikesmukla.ac.id/repository/mcpe_GM479516143.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/roblox-gang_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/roblox-account-stealing-hack_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/completely-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-model-purchase-request-roblox-spam_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-robux-grould_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-gift-card-roblox-giveaway-live_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/everything-on-the-roblox-catalog-free-fast_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-apk-hack-download_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-roblox-gift-card-codes-2021-unused_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/wurst-18_GM479516143.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/roblox-free-kins_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-redeem-code-on-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-small-amount-of-robux-fre_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/medikit-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-robux-rewards_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_off00002ebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EBE 22160 bytes
SHA-256: f0b29f09cb2d6eae0420a2a15212bd87e2167bd742e4b1db2ac7ca5a6072dbd1
font_01_sfnt_off00005fc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC5 18964 bytes
SHA-256: e1def2a9526019231b9d88ec7edfc28da13730703cf387a4434b27a982203b29

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