Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a3e5f4a8ba65c5d…

MALICIOUS

PDF

41.8 KB Created: 2021-05-22 22:34:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a4df24dd3de45ec01e144d2d9b76a04c SHA-1: 5b9e54d8676b3198ea6641837778eb5c8810c0b2 SHA-256: 2a3e5f4a8ba65c5d76c79dc82a23924b3c84bdf0e9f7a1945ad59803d4b2aa65
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, including one identified as a malicious redirector for a 'free generator / game hack'. The document body explicitly mentions 'Roblox Speed Hack' and 'CLICK HERE TO ACCESS ROBLOX GENERATOR', reinforcing the lure. The presence of multiple links to potentially malicious content suggests an attempt to drive users to exploit or scam websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8120

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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 https://netcdn.xyz/app/431946152/roblox-speed-hack-game-hack In PDF document text
    • https://elearning.mtsn6blitar.com/__statics/gudangsoal/files/my-minecraft-account-was-hacked_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn6blitar.com/__statics/gudangsoal/files/free-spins-coin-master-app-iphone_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn6blitar.com/__statics/gudangsoal/files/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn6blitar.com/__statics/gudangsoal/files/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdfIn PDF document text
    • https://elearning.mtsn6blitar.com/__statics/gudangsoal/files/all-links-for-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000351c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x351C 29448 bytes
SHA-256: 8feb3ce1484469873333d94c6c259a4333ae9137a68dc656998bcb9a642510df
font_01_sfnt_off000077a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77A7 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off00008156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8156 18532 bytes
SHA-256: ecd25e1cae784267f5a646f1b70b1ce742945d3ce40e95dc5b3aacf46c412aa4