Malicious PDF — malware analysis report

Static analysis result for SHA-256 77556e0f5c6aff2d…

MALICIOUS

PDF

43.4 KB Created: 2021-05-11 05:32:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 35794bcb82ab57b94bb389471b606f8e SHA-1: 1a9b210fee8fa661a697f3982ecd6f1e8eee2a2a SHA-256: 77556e0f5c6aff2d09c56deff5fc3dd25d8bbeef316e303f3c66715eb745e366
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a website offering game hacks, a common lure for phishing or scam operations. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to lead the user to a malicious site, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/431946152/jailbreak-script-game-hack In PDF document text
    • https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/rbx-free_GM431946152.pdfIn PDF document text
    • https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/coin-master-pro-hack_GM406889139.pdfIn PDF document text
    • https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/how-to-play-coin-master_GM406889139.pdfIn PDF document text
    • https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/is-minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/coin-master-daily-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/links-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/rbx-hut_GM431946152.pdfIn PDF document text
    • https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/mcpe-download_GM479516143.pdfIn PDF document text
    • https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/free-robux-no-download_GM431946152.pdfIn PDF document text
    • https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/free-minecraft-generator_GM479516143.pdfIn PDF document text
    • https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/minecraft-java-edition-free-code_GM479516143.pdfIn PDF document text
    • https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/free-robux-accounts_GM431946152.pdfIn PDF document text
    • https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/what-do-roblox-points-do_GM431946152.pdfIn PDF document text
    • https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/coin-master-free-spins-8-14-2021_GM406889139.pdfIn PDF document text
    • https://www.nrzroblox.comIn 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
stream_003_off00004ab1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AB1 27276 bytes
SHA-256: cc03afcb7fb28843510115f7c6e1bf42ae3471c9637f3da4dcef0a4c01fdbd41
font_01_sfnt_off00008725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8725 18396 bytes
SHA-256: dd00d97670717f9cdb465160a291fa8ed9f0e6025989a87ef9881f91f27b201e

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