Malicious PDF — malware analysis report

Static analysis result for SHA-256 633cb75e5fecc2cf…

MALICIOUS

PDF

39.2 KB Created: 2021-05-21 11:14:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e0e57aa75f15861bdc045ae2dedbe02a SHA-1: f9ec0f0690001f29e80b1e0aba5ef27a91f0886a SHA-256: 633cb75e5fecc2cf8aae7666112bdcd2f1690e85f8ae8c3ca0ea1ccb2996677c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external URLs, one of which is identified as a malicious redirector associated with 'free generator' or 'game hack' lures. The document body and embedded links suggest a social engineering attempt to trick users into visiting these sites, likely for phishing or malware distribution. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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/get-me-robux-for-free-game-hack In PDF document text
    • https://emindonesia.com/assets/CKImages/files/coin-master-fan-page_GM406889139.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/can-pokemon-go-free-evolution_GM1094591345.pdfIn PDF document text
    • https://emindonesia.com/assets/CKImages/files/minecraft-launcher-free_GM479516143.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
font_00_sfnt_off000032aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32AA 25772 bytes
SHA-256: f1ee121a5dc5c39567c2f112605efc669781ca9a08c660d401a4e1b0e12f88cd
font_01_sfnt_off00006cad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CAD 3112 bytes
SHA-256: 471f662098e83c5562504503f5e7603b336ca0957605358090bb98e15c7aed80
font_02_sfnt_off00007767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7767 18312 bytes
SHA-256: 932e048767bb22e6267a54c454926b1d6572868c8ffb63cd4dd0c91a684054b1

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