Malicious PDF — malware analysis report

Static analysis result for SHA-256 0badaa32a88dbacb…

MALICIOUS

PDF

40.7 KB Created: 2021-05-21 06:03:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: bc08d0095a706ceee7bda2fec6c403dc SHA-1: 0af1b6e0186c69892e6721c4696e0fefe3ef4533 SHA-256: 0badaa32a88dbacb036f41e89495f1c1d0dc2d1f491aa03980a62936e26a939f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, one of which, 'https://netcdn.xyz/app/431946152/free-promo-codes-for-robux-game-hack', is flagged as a known malicious redirector. The document body and heuristics indicate a lure for free game currency or hacks, a common social engineering tactic. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to potentially malicious sites, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7445

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 https://netcdn.xyz/app/431946152/free-promo-codes-for-robux-game-hack In PDF document text
    • http://el28.ddns.net/__statics/gudangsoal/files/coin-master-daily-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://el28.ddns.net/__statics/gudangsoal/files/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://el28.ddns.net/__statics/gudangsoal/files/robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://el28.ddns.net/__statics/gudangsoal/files/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://el28.ddns.net/__statics/gudangsoal/files/what-is-robux-in-roblox_GM431946152.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_off00003532.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3532 25436 bytes
SHA-256: c48e354816e22690b94bd68cda4c39700abd61a5b2d70aab87df67eab7c544b9
font_01_sfnt_off00007043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7043 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00007cea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CEA 18604 bytes
SHA-256: f71c03fba91376071fb946d88a6d16afcc2c6d61aa4ef632c3571b6200829f5d

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