Malicious PDF — malware analysis report

Static analysis result for SHA-256 a09a0fe9185f0f18…

MALICIOUS

PDF

32.4 KB Created: 2021-07-19 08:33:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9b5766637c908af58eef26fa6d915c71 SHA-1: c98b8ebbd9dcebdb3cffc173b61aa5490cb9b9c8 SHA-256: a09a0fe9185f0f18ba9594553e187593aff81239bb74ecea746fbebbec20873c
82 Risk Score

Malware Insights

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

The document contains a lure for free TikTok followers, impersonating Apple, and directs users to a malicious URL. The embedded URL http://netcdn.tw/app/835599320/free-followers-for-tiktok-game-hack is associated with credential phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

Heuristics 4

  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: http://netcdn.tw/app/835599320/free-followers-for-tiktok-game-hack.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-followers-for-tiktok-game-hack PDF link annotation
    • https://bc97.de/images/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://bc97.de/images/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • https://bc97.de/images/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • https://bc97.de/images/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://bc97.de/images/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://bc97.de/images/free-fans-on-tiktok_GM835599320.pdfIn PDF document text
    • https://bc97.de/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://bc97.de/images/free-tiktok-followers-generator_GM835599320.pdfIn PDF document text
    • https://bc97.de/images/minecraft-story-mode-free_GM479516143.pdfIn PDF document text
    • https://bc97.de/images/coin-master-daily-free-spins-link-app_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_off00002d3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D3C 22160 bytes
SHA-256: c814f87f14c098007578f808de64800d29fa8b0cae5c7cf9cc115da945e06a7d
font_01_sfnt_off00005e3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E3E 17692 bytes
SHA-256: 1f78b91f0c2492c05ffeec3d34563e43a0b15f4cc5b4ec219908e79cb2313b3f

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