Malicious PDF — malware analysis report

Static analysis result for SHA-256 9694752548114d9f…

MALICIOUS

PDF

33.7 KB Created: 2021-07-04 18:10:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ec88708a1965852e7f7f589763f877f5 SHA-1: 6ae87748ffd66ddd5bcef76817990b49ad39ab08 SHA-256: 9694752548114d9f3914a979d37785b21040993dcd8211c44a5788a0d188b662
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains embedded links that lead to a known malicious redirector, masquerading as a game hack or free currency generator. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple redirector links indicates a phishing or scam attempt. The document body and embedded URLs reinforce the lure of obtaining free Robux or game cheats.

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/can-you-get-free-robux-on-roblox-game-hack In PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-coins-for-planet-master-game_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-free-500-spins-link_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-free-spins-link-ios_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/robux-money_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/how-to-get-free-robux-jefftec_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/noob-vs-pro-vs-hacker-vs-god-minecraft_GM479516143.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-trello-gold-roblox_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/how-many-free-spin-links-is-there-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/claim-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/how-to-make-your-own-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-free-download-pc_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/pokemon-go-free-healing_GM1094591345.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-codes-for-assassin-roblox_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/rblx-city-free-robux_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_off00002f04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F04 21680 bytes
SHA-256: b7e4e04a777d061672401f06f71205c9d2c558f6ea98cbf8845eb7b117399321
font_01_sfnt_off00005e9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E9D 19056 bytes
SHA-256: 212cafc25ec0536741ac5c1aa90543f36b34a777adc44243741e4ba36ab4d37b