Malicious PDF — malware analysis report

Static analysis result for SHA-256 feb8102beafc8659…

MALICIOUS

PDF

45.7 KB Created: 2021-05-11 19:30:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b96beaed52dc4e3ff3efab52ff4dbe8a SHA-1: f5bc62a268a9d39a769b0b85e353d44b0f30d246 SHA-256: feb8102beafc865903688ca32a62116ab13e1039434e19c2beca9afb02e82da3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'game hacks' and 'free items' to entice users into clicking malicious links. The embedded links, including the primary one to 'netcdn.xyz', are identified as malicious redirectors, likely leading to further stages of infection or phishing. The document's structure and embedded URLs strongly suggest a phishing or malware distribution campaign, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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 https://netcdn.xyz/app/406889139/unlimited-spin-coin-master-hack-game-hack In PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/coin-master-link_GM406889139.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/robux-free-online_GM431946152.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/coin-master-free-spins-daily-link-game-mod_GM406889139.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/how-to-hack-coin-master-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/free-pet-treats-coin-master_GM406889139.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/roblox-robux-generator-tool_GM431946152.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/free-minecraft-packs_GM479516143.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/coin-master-free-spins-2021-today_GM406889139.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/open-coin-master_GM406889139.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b6d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B6D 25544 bytes
SHA-256: ac2ce85a74ddf4862c8eb9349bc8453a56fb1cc263af6e4b8966d4926fd35eec
font_01_sfnt_off00008583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8583 2868 bytes
SHA-256: d2d857e2ddc1082c7667b23f2135a5c0ba26a2ff8b42c86c89c8e0b09aece855
font_02_sfnt_off00008f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F6E 18584 bytes
SHA-256: ae98b113e243a6dee09af4228d4dcf65a32797416eb214c6eaedfd928d742d84

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