Malicious PDF — malware analysis report

Static analysis result for SHA-256 25a04e04211d7d8a…

MALICIOUS

PDF

34.7 KB Created: 2021-07-04 00:49:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 9ccc7f5bd54fb77bc1ab778a0ccbc2d0 SHA-1: dba7bf066d6c29d87aa5ce3f4e20de3ef9074bd9 SHA-256: 25a04e04211d7d8ace565236952710c9cfa75b457843ca8ce72d6d0892f9a02e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The primary lure appears to be related to Roblox and Coin Master, aiming to trick users into visiting malicious sites. The presence of multiple redirector links and the ML classifier's high confidence score indicate a malicious intent to lead users to potentially harmful content or further exploits.

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/hack-roblox-players-game-hack In PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/robux-cheat_GM431946152.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/free-online-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/free-spins-promo-code-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/hackear-coin-master-sin-root_GM406889139.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/nuevo-hack-de-robux-2021-funcionando_GM431946152.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/free-robux-link_GM431946152.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/coin-master-card-collection-hack-apk_GM406889139.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/coin-master-apk-hack-3527_GM406889139.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/is-minecraft-java-free_GM479516143.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/free-robux-giveaway_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_off0000317b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x317B 22172 bytes
SHA-256: efa12d3ec362315280498f6a2df0ce6b97cdfa07230b1fc29c17d3adb8e497bf
font_01_sfnt_off000062c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C4 18992 bytes
SHA-256: c8ece8e41cb02cb390b78a7de8842534a538b51bc12e46e9414b78277a363219

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