Malicious PDF — malware analysis report

Static analysis result for SHA-256 fea2901f10008e24…

MALICIOUS

PDF

39.2 KB Created: 2021-05-25 10:00:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 2e64d42dee9a67703eee79150dc43aeb SHA-1: 928d68638817bbbaf883968cb9e16e7d17bbc6ac SHA-256: fea2901f10008e24d75ad978f3cd0b96d67028d7252676326592c7184bb64eb6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, masquerading as game-related generators or downloads. The heuristic firings indicate that the PDF links to known malicious redirectors and is classified as malicious by an ML model. Although no scripts were extracted, the embedded URLs and the nature of the lures suggest an attempt to drive users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9476

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/479516143/minecraft-classic-free-game-hack In PDF document text
    • http://belajar.kurman1kotasemarang.com/__statics/gudangsoal/files/free-robux-now_GM431946152.pdfIn PDF document text
    • http://belajar.kurman1kotasemarang.com/__statics/gudangsoal/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://belajar.kurman1kotasemarang.com/__statics/gudangsoal/files/coin-master-game-free-download_GM406889139.pdfIn PDF document text
    • http://belajar.kurman1kotasemarang.com/__statics/gudangsoal/files/free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://belajar.kurman1kotasemarang.com/__statics/gudangsoal/files/pokemon-go-free-zoo_GM1094591345.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_off00003716.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3716 30740 bytes
SHA-256: dcbc6686d5ea08ed3cbff7083467a84979846c8b1a9453984665d6678814fe0a
font_01_sfnt_off00007a7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A7F 17644 bytes
SHA-256: 1ee95ff2a7de50dda93d1224861f64f53bfa9b684d20bd49bdd14d4804095e27

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