Malicious PDF — malware analysis report

Static analysis result for SHA-256 35d70d6c81f734d7…

MALICIOUS

PDF

33.3 KB Created: 2021-07-09 03:11:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 72b5cab20878f3c75827f1c233285698 SHA-1: 176318e295544601f99d850d73fb6e94c5fff149 SHA-256: 35d70d6c81f734d7e717da3da341ec8acd3160dd71ee0f977745870d7de9bc95
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting free game hacks and generators. The primary redirector URL is http://netcdn.tw/app/479516143/minecraft-pe-server-hosting-free-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering tactic to lead users to potentially harmful content or further malware downloads.

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/479516143/minecraft-pe-server-hosting-free-game-hack In PDF document text
    • http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/robloxbuddy-me-free-robux_GM431946152.pdfIn PDF document text
    • http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/roblox-free-hair-codes_GM431946152.pdfIn PDF document text
    • http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/free-spins-coin-master-links-no-human-verification_GM406889139.pdfIn PDF document text
    • http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/free-robux-co_GM431946152.pdfIn PDF document text
    • http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/robux-hack-today_GM431946152.pdfIn PDF document text
    • http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/how-to-get-robux-for-free-without-cheating-or-hacking_GM431946152.pdfIn PDF document text
    • http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/free-roblox-executor_GM431946152.pdfIn PDF document text
    • http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/coin-master-invite-friends-hack_GM406889139.pdfIn PDF document text
    • http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/a-hacker-is-threatening-me-roblox_GM431946152.pdfIn PDF document text
    • http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/can-you-make-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/free-robux-hack-2021-youtube_GM431946152.pdfIn PDF document text
    • http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/how-to-hack-a-roblox-account-with-inspect-element-2021_GM431946152.pdfIn PDF document text
    • http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/uirbxclub-roblox-roblox-hack_GM431946152.pdfIn PDF document text
    • http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/buy-my-free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/roblox-mobile-hack_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_off00002f49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F49 22056 bytes
SHA-256: cd0fc5c49052d3fabb3f5b4df9465cd84531dbad34a8d37b88d64953079e0a4e
font_01_sfnt_off00005fac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAC 18264 bytes
SHA-256: 5ec3f0b561cebc5d47f64e939320a46a649b92723dcace5f5f230f044584545d

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