Malicious PDF — malware analysis report

Static analysis result for SHA-256 685b6f89c43b485c…

MALICIOUS

PDF

34.6 KB Created: 2021-07-07 11:55:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 40b4ce9a59d8408d5effa5ea79251e72 SHA-1: 3125dcfe972f014a659df8d26789ad413fc798eb SHA-256: 685b6f89c43b485cb83895620ce1ab79f9aedb6d8552a2326316bcf529453d87
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on what appears to be a game hack or free currency generator. The primary link redirects to malicious infrastructure, indicating a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a potential for further malicious actions, such as downloading additional payloads or redirecting to credential harvesting pages.

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/robloxfun-com-robux-game-hack In PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/minecraft-free-download-no-virus_GM479516143.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/free-coin-master-spins-blogger_GM406889139.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/hack-roblox-counter-blox-download_GM431946152.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/coin-master-for-pc-free-download_GM406889139.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/free-roblox-svg_GM431946152.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/coin-master-free-daily-rewards_GM406889139.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/how-to-get-roblox-account-hack_GM431946152.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/roblox-hack-free-skins_GM431946152.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-link-today_GM406889139.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/free-tiktok-likes-trial_GM835599320.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/will-roblox-be-for-free-when-it-come-to-ps4_GM431946152.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • http://elearningnew.mansasingkawang.sch.id/__statics/gudangsoal/files/is-minecraft-free-on-pc_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
font_00_sfnt_off00003266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3266 21852 bytes
SHA-256: 05cee0dcfff05739b2cfc94cc3066d208c59bd6b1783045ac3588fcdb813e9b7
font_01_sfnt_off000062ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62AC 18884 bytes
SHA-256: 1cf3260265f7ee081a4002ebb70d89eea59c62c50fe2f65c39eaed554a14a9c3

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