Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aa97ae7a0811ea5…

MALICIOUS

PDF

37.5 KB Created: 2021-05-21 20:08:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: c45d6e45c6b234c363c712f7718bfac6 SHA-1: e2be041576bb715937454925facceb8d0bbbb93f SHA-256: 1aa97ae7a0811ea5e8798fe44fffa950a82ab1689a3777b91c0cdae646a72058
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and potentially malicious websites, disguised as 'free generators' or 'game hacks'. The document body includes phrases like 'CLICK HERE TO ACCESS ROBLOX GENERATOR', indicating a social engineering lure. The presence of embedded URLs and the ML classifier's high confidence score suggest a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/robux-free-com-game-hack In PDF document text
    • https://www.u-pin-it.com/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.u-pin-it.com/images/how-to-get-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://www.u-pin-it.com/images/hack-coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • https://www.u-pin-it.com/images/androeed-ru-minecraft_GM479516143.pdfIn PDF document text
    • https://www.u-pin-it.com/images/coin-master-free-spin-ml_GM406889139.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_off0000343d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x343D 26068 bytes
SHA-256: 0f29a280afc358280d656546f9a8d81f7951e9dbb0177bab7cf1db3da8d6606a
font_01_sfnt_off0000715c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x715C 18276 bytes
SHA-256: 0fd65c317a1abc649e3faff400e4768e1aa7d1dd6ac5589c15474ffa47aab2c1

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