Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5c7079c35d7df38…

MALICIOUS

PDF

36.4 KB Created: 2021-05-24 00:10:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: aaa43bf02a706e241aa41c6ea98aaa3d SHA-1: da98416b00a29bfd95e97a792734ecbc540be653 SHA-256: d5c7079c35d7df3874bcd22d7fd6982352df40f2946ca9f8f28277d20fa4b05b
200 Risk Score

Malware Insights

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

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as a game hack or generator. One of these links impersonates Office 365, indicating a credential phishing attempt. The PDF itself contains embedded URLs and a call-to-action button, further supporting the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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.
  • 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: https://netcdn.xyz/app/479516143/how-to-get-minecraft-windows-10-edition-for-free-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
  • 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/479516143/how-to-get-minecraft-windows-10-edition-for-free-game-hack In PDF document text
    • https://www.milewood.co.uk/images/how-to-log-out-of-coin-master_GM406889139.pdfIn PDF document text
    • https://www.milewood.co.uk/images/coin-master-hack-apk-link_GM406889139.pdfIn PDF document text
    • https://www.milewood.co.uk/images/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.milewood.co.uk/images/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • https://www.milewood.co.uk/images/cool-minecraft-hacks_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
stream_002_off000034a2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34A2 24680 bytes
SHA-256: b3fcb11084d3873b56bbacaf42dcad0a852ef7139ba622345da55d8b59b0fcd0
font_01_sfnt_off00006c00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C00 18524 bytes
SHA-256: 758265ab9626b01b7f82acdeb793963e34ce825989d987f26b8b838bd6c44d94

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