Malicious PDF — malware analysis report

Static analysis result for SHA-256 325bbcea92f7e9ac…

MALICIOUS

PDF

39.7 KB Created: 2021-05-10 17:32:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0fe6648509a56e2dce702576b1805bf4 SHA-1: 8f39b3fbbee81d9b3cadadb7efdc2ce15860c04e SHA-256: 325bbcea92f7e9acf12dca1ce012f5713bf84067693ce94b124dac0e8352775c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links that redirect to websites promoting game hacks and generators, a common lure for phishing and scam operations. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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/roblox-robux-game-hack In PDF document text
    • https://newenglandafs.com/images/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/coin-master-hack-no-survey-2021_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/free-coins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • https://newenglandafs.com/images/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/what-is-robux_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdfIn PDF document text
    • https://newenglandafs.com/images/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/minecraft-free-download-android-apk-014-0_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
font_00_sfnt_off000043a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43A9 24044 bytes
SHA-256: a8f94b2c9e0d5ad10f4384cb95a6ee34870527b2322b6b27a36fa5c5e8b18cd3
font_01_sfnt_off00007a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A30 17924 bytes
SHA-256: 85e3be4e3e2e58a235542e1db776439a3ce81e3e8a81a438b582233699a3a0dc

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