Malicious PDF — malware analysis report

Static analysis result for SHA-256 074bb35a4d3ad646…

MALICIOUS

PDF

34.3 KB Created: 2021-07-03 20:25:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: eaa6a325a5f9a40b0422e47a050dcd9a SHA-1: 338ba18f2b68f4e5bd69cc03636ff26b47258bf0 SHA-256: 074bb35a4d3ad6465944c67cb1bc5d0dba9d03a24f633ced89a0dc7e7a69d33e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a known malicious redirector, that are designed to lure users into clicking them under the guise of free game-related content. The presence of a download button lure and the ML classifier's high confidence score further support the malicious nature of this document. No scripts were extracted, but the embedded URLs and the document's structure indicate a phishing or scam attempt.

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-sites-2021-game-hack In PDF document text
    • http://elearning.minailululum.site/__statics/gudangsoal/files/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://elearning.minailululum.site/__statics/gudangsoal/files/how-to-downgrade-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://elearning.minailululum.site/__statics/gudangsoal/files/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://elearning.minailululum.site/__statics/gudangsoal/files/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://elearning.minailululum.site/__statics/gudangsoal/files/watch-ads-for-robux_GM431946152.pdfIn PDF document text
    • http://elearning.minailululum.site/__statics/gudangsoal/files/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://elearning.minailululum.site/__statics/gudangsoal/files/free-synapse-roblox-exploit_GM431946152.pdfIn PDF document text
    • http://elearning.minailululum.site/__statics/gudangsoal/files/how-to-use-patcheds-hacks-for-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.minailululum.site/__statics/gudangsoal/files/roblox-blue-shirt-free_GM431946152.pdfIn PDF document text
    • http://elearning.minailululum.site/__statics/gudangsoal/files/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.minailululum.site/__statics/gudangsoal/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://elearning.minailululum.site/__statics/gudangsoal/files/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.minailululum.site/__statics/gudangsoal/files/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • http://elearning.minailululum.site/__statics/gudangsoal/files/coin-master-on-facebook_GM406889139.pdfIn PDF document text
    • http://elearning.minailululum.site/__statics/gudangsoal/files/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
    • http://elearning.minailululum.site/__statics/gudangsoal/files/how-to-hack-roblox-game-money_GM431946152.pdfIn PDF document text
    • http://elearning.minailululum.site/__statics/gudangsoal/files/get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.minailululum.site/__statics/gudangsoal/files/free-item-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elearning.minailululum.site/__statics/gudangsoal/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://elearning.minailululum.site/__statics/gudangsoal/files/roblox-hack-robux-download-tool_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_off00003072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3072 21636 bytes
SHA-256: 924dc3f29145b66fc5c736a7162dd4b2e339623886777c59859729142f258f6e
font_01_sfnt_off00005ffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FFC 19340 bytes
SHA-256: bf872f38d37b2489c3690af0fb3a59d21ccad535cade2ac40decd632f59a44ea

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