Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebe1708350d977fc…

MALICIOUS

PDF

35.3 KB Created: 2021-07-07 23:09:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 7532cbb529398f46a9583bbbc4a02a72 SHA-1: 4f74b1d5395cdba2c720172febdde6426e2defda SHA-256: ebe1708350d977fc47bedb06832ff3f5f712c1e2dcea025f45916cd8941860ad
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to 'netcdn.tw', which is flagged as a known malicious redirector. The document body and heuristics indicate a lure for game-related cheats or currency, likely to lead users to a malicious site or download further malware. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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/free-robux-codes-28-game-hack In PDF document text
    • http://perpustakaan-stikesmsb.com/repository/honey-hack-roblox-bee-swarm_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-robux-no-human-verification-at-all_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/freemobile-360info-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/roblox-level-6-exploit-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/roblox-royale-high-cheats-for-diamonds-november-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/codes-to-get-free-robux-may_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-roblox-exploit-no-virus_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-tiktok-comments_GM835599320.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/robux-hacks-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-obc-thumbnail-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-rebirths-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/roblox-fortnite-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/roblox-club-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-clothing-on-roblox-names-for-girls_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_off000030ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30EE 23044 bytes
SHA-256: 6cbc48542c36912c279e0fde03d866e0e3c5a4bc99189743c7c685a95527d278
font_01_sfnt_off000064b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64B9 19040 bytes
SHA-256: 77d483ca5ebf86884d98811101a0c6454acce136179f083a33a7003e70f84a73

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