Malicious PDF — malware analysis report

Static analysis result for SHA-256 87437a6074fae6e1…

MALICIOUS

PDF

38.9 KB Created: 2021-05-10 14:16:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 27f526767d14a5cea2fc9942077e052e SHA-1: 22aab615d16c4cb072a01dd69b9668e921a39edd SHA-256: 87437a6074fae6e16a16ac2c6013d6d65f5a67089e0251ee5576ef5776202389
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as "free generators" for popular games. The document body and embedded links explicitly promote these lures, aiming to trick users into visiting malicious sites. While no scripts were directly extracted, the nature of the links suggests a potential for further malicious activity, such as downloading additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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-games-with-free-boombox-game-hack In PDF document text
    • http://iglesiashispanas.org/images/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://iglesiashispanas.org/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://iglesiashispanas.org/images/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://iglesiashispanas.org/images/coin-master-free-spins-and-cards_GM406889139.pdfIn PDF document text
    • http://iglesiashispanas.org/images/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://iglesiashispanas.org/images/how-to-play-coin-master_GM406889139.pdfIn PDF document text
    • http://iglesiashispanas.org/images/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://iglesiashispanas.org/images/free-robux-no-verification-no-download-2021_GM431946152.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_003_off00003a3c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3A3C 25312 bytes
SHA-256: 1ddb903e82e928d195f83ff92389851d76a1a1724a90b1ba0e4929361a3ed15e
font_01_sfnt_off00007406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7406 19024 bytes
SHA-256: f19becf6ce6933bb0ac9725c8bd55fde31cd7c8868717e467a8d53035955367c

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