Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2b98d9922fc22ef…

MALICIOUS

PDF

31.6 KB Created: 2021-07-19 17:24:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: fdebc5060414cbef33cc67e5a90b339b SHA-1: a0b2c12aea01838c5bc6f157212916457ab9bdb1 SHA-256: f2b98d9922fc22efb9c00729c9b4d5d5051df724a8415196cca522b84c86e9bc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users with promises of free game items or followers. One critical heuristic identified a link to known malicious redirector infrastructure at http://netcdn.tw/app/835599320/get-free-tiktok-followers-game-hack. The document body and embedded links suggest a social engineering tactic to drive traffic to potentially malicious sites. No scripts were extracted, but the presence of embedded URLs and the lure indicate a phishing or scam attempt.

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/835599320/get-free-tiktok-followers-game-hack In PDF document text
    • https://e-learning-man1polman.com/__statics/gudangsoal/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://e-learning-man1polman.com/__statics/gudangsoal/files/how-to-get-free-tiktok-fans-without-human-verification_GM835599320.pdfIn PDF document text
    • https://e-learning-man1polman.com/__statics/gudangsoal/files/free-robux-scams_GM431946152.pdfIn PDF document text
    • https://e-learning-man1polman.com/__statics/gudangsoal/files/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://e-learning-man1polman.com/__statics/gudangsoal/files/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://e-learning-man1polman.com/__statics/gudangsoal/files/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • https://e-learning-man1polman.com/__statics/gudangsoal/files/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • https://e-learning-man1polman.com/__statics/gudangsoal/files/free-robux-link_GM431946152.pdfIn PDF document text
    • https://e-learning-man1polman.com/__statics/gudangsoal/files/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • https://e-learning-man1polman.com/__statics/gudangsoal/files/minecraft-login-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
font_00_sfnt_off00002a0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A0E 22100 bytes
SHA-256: e8de73eeb0b9bb3467595155cb7bc54b366bad282310acd5de814cf6fecd09eb
font_01_sfnt_off00005b1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B1E 17692 bytes
SHA-256: 02c3cedea4a2807b323b614e41e6797ad921ddb65350057b59541dca36dbbb9a