Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee93bb3db2bca502…

MALICIOUS

PDF

32.3 KB Created: 2021-07-19 12:56:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ca1aaff736ab5c563082e2a3a13e9d88 SHA-1: 26c1b84f10730c6febab82e8b0da10817e0e35c0 SHA-256: ee93bb3db2bca5024cd58ad6f833335aca79e1ec1567bf1159465209e940adbc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and known malicious infrastructure, specifically advertising "free Robux" and "game hacks" to lure users. The ML classifier also strongly indicated maliciousness. The document body and embedded links suggest a phishing or scam attempt designed to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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-offers-game-hack In PDF document text
    • http://montchanintt.fr/images/free-tiktok-views_GM835599320.pdfIn PDF document text
    • http://montchanintt.fr/images/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://montchanintt.fr/images/minecraft-skins-download-free_GM479516143.pdfIn PDF document text
    • http://montchanintt.fr/images/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://montchanintt.fr/images/free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • http://montchanintt.fr/images/get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • http://montchanintt.fr/images/minecraft-launcher-free_GM479516143.pdfIn PDF document text
    • http://montchanintt.fr/images/how-to-get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • http://montchanintt.fr/images/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://montchanintt.fr/images/how-to-host-a-minecraft-server-for-free_GM479516143.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
stream_002_off00002a53.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A53 22560 bytes
SHA-256: 5757641112ce64b1e8d45813c176ce04fcfe8116591502d8401cf4b25e3f21c6
font_01_sfnt_off00005c90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C90 18200 bytes
SHA-256: e0a7c020d8fb886e6e6af22e59e327724b1d58f4fe63ad13f7dbfe7506eb50a9