Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd71219ebeefa482…

MALICIOUS

PDF

34.4 KB Created: 2021-07-04 09:45:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 999143d242cbe3ae576a6567c5dd341c SHA-1: 4aa84d9f7e44742c7989b3d9faef36339b876eeb SHA-256: cd71219ebeefa482406b2544d4273de78fb57b74dc14daae8498e2d155160988
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors, including one specifically advertising a 'tiktok follower bot free game hack'. The document body and heuristics indicate a lure to download or access content from these malicious URLs. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it is designed to exploit vulnerabilities or trick the user into navigating to malicious sites, likely leading to further malware download or exploitation.

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/835599320/tiktok-follower-bot-free-game-hack In PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/is-roblox-free-on-pc_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-roblox-cute-hair_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/all-coin-master-spin-link-and-free-download_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/archery-master-3d-apk-and-mod-free-download-unlimited-coins_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hack-ios_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-ban-people-from-servers-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/roblox-com-free-play_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/roblox-rewards-site_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-account_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-free-education_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hack-facebook_GM406889139.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_off000030aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30AA 22748 bytes
SHA-256: 8431a09c78d69121f2097843ad084c2c15e5f381083957d754e2fcf76b34bfe3
font_01_sfnt_off00006369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6369 18428 bytes
SHA-256: affadc9525e73c214b04e52c3329ac878b5dc0447f7849dc6b07f5a35e49d9d0

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