Malicious PDF — malware analysis report

Static analysis result for SHA-256 a583ddca9a5cb6a8…

MALICIOUS

PDF

32.2 KB Created: 2021-07-21 05:53:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 40de027b482395f0654f23215943f068 SHA-1: e7a7c44a2e78104878a7187c545bec54cb20ff83 SHA-256: a583ddca9a5cb6a87ee9bf192544de73e887afaec7ee04d955b138b66adc71a2
160 Risk Score

Malware Insights

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

The PDF document contains multiple embedded links and a visual call-to-action button, all directing users to a known malicious redirector infrastructure. The primary lure is for "free TikTok coins" or "game hacks", which is a common social engineering tactic. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a potential for exploitation or further redirection to malicious content.

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/free-tiktok-coins-game-hack In PDF document text
    • https://contentwriters.pk/wp-content/uploads/fsqm-files/freer-pro-tiktok-fans_GM835599320.pdfIn PDF document text
    • https://contentwriters.pk/wp-content/uploads/fsqm-files/free-tiktok-accounts-with-followers_GM835599320.pdfIn PDF document text
    • https://contentwriters.pk/wp-content/uploads/fsqm-files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • https://contentwriters.pk/wp-content/uploads/fsqm-files/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • https://contentwriters.pk/wp-content/uploads/fsqm-files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • https://contentwriters.pk/wp-content/uploads/fsqm-files/free-robux-legit_GM431946152.pdfIn PDF document text
    • https://contentwriters.pk/wp-content/uploads/fsqm-files/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • https://contentwriters.pk/wp-content/uploads/fsqm-files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://contentwriters.pk/wp-content/uploads/fsqm-files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://contentwriters.pk/wp-content/uploads/fsqm-files/free-robux-gift-card-codes_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_off00002aef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AEF 22916 bytes
SHA-256: c8d8d3788fadd563316307c812941ed3189cddbecdf9b285755c9d939eb2b43e
font_01_sfnt_off00005e4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E4A 17456 bytes
SHA-256: af63c3f67091ff5b4163c7a95634870b81efad78e40c2266e63b82bf422718e0

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