Malicious PDF — malware analysis report

Static analysis result for SHA-256 094c7c582371aab3…

MALICIOUS

PDF

34.8 KB Created: 2021-07-06 17:00:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ecd915f6aa51d903d492e4855b5ec8b6 SHA-1: d4ea7b5ed199e4ca4653aa0e6c97478a9ea9cc3a SHA-256: 094c7c582371aab37a032d82048fa56b59b8e4e850f77c5adab0fdfb4bbe9de1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that are identified as malicious redirectors, specifically targeting users with lures related to free Robux and game hacks. The document body and heuristic firings confirm the presence of these deceptive links, which are designed to lead users to potentially harmful websites. No scripts were extracted from this sample, but the primary attack vector appears to be social engineering via deceptive links.

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/ways-to-get-free-robux-game-hack In PDF document text
    • http://razredna-nastava.net/files/coin-master-free-spins-link-download-today_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-inject-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/cheat-codes-for-roblox-royale-high-android_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-robux-glitch_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/cheat-mod-roblox_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-minecraft-videos_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/no-robux_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/i-want-to-break-free-roblox-version_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/robux-hack-2021-no-survey_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/fe-dll-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/is-roblox-free-on-nintendo-switch_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-robux-no-human-verification-2021-or-survey-ios_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-minecraft-hacks_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_off0000318b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x318B 22188 bytes
SHA-256: 0b14c91f8a3593df1a00a9f6eff8605ad789e78db3dd9a9fd2702b0d6fd10f99
font_01_sfnt_off00006292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6292 19196 bytes
SHA-256: 96331d0996f68a985869c858ea36cc40aa482b0fedd10a8c06058efa80dfe966

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