Malicious PDF — malware analysis report

Static analysis result for SHA-256 371bb2c04bcfe96e…

MALICIOUS

PDF

43.5 KB Created: 2021-04-29 20:45:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a8399ddc2b824f834f7d7c887324f1c0 SHA-1: ce5a4812c29dc2dac27a4066eec09021affb7e94 SHA-256: 371bb2c04bcfe96e07cb12030353dff40bea166265a90bfe7f5060b60167050a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one identified as a malicious redirector, designed to lure users with promises of game hacks and free items. The primary malicious link directs to 'https://netcdn.xyz/app/431946152/xbox-one-roblox-how-can-i-select-the-free-egg-game-hack'. No scripts were extracted, but the embedded URLs and the nature of the lure strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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/xbox-one-roblox-how-can-i-select-the-free-egg-game-hack In PDF document text
    • http://library.vsi.esdm.go.id/katalog/slims7_cendana-master/repository/case-clicker-roblox-cheat.pdfIn PDF document text
    • http://library.vsi.esdm.go.id/katalog/slims7_cendana-master/repository/how-to-get-free-robux-on-roblox-by-playing-games.pdfIn PDF document text
    • http://library.vsi.esdm.go.id/katalog/slims7_cendana-master/repository/how-to-hack-roblox-accounts-2021-march.pdfIn PDF document text
    • http://library.vsi.esdm.go.id/katalog/slims7_cendana-master/repository/comment-hacker-le-cataloggue-de-roblox.pdfIn PDF document text
    • http://library.vsi.esdm.go.id/katalog/slims7_cendana-master/repository/clicker-games-in-roblox-free-admin.pdfIn PDF document text
    • http://library.vsi.esdm.go.id/katalog/slims7_cendana-master/repository/roblox-rules-cheating.pdfIn PDF document text
    • http://library.vsi.esdm.go.id/katalog/slims7_cendana-master/repository/can-i-get-roblox-for-free.pdfIn PDF document text
    • http://library.vsi.esdm.go.id/katalog/slims7_cendana-master/repository/tears-hack-roblox.pdfIn PDF document text
    • http://library.vsi.esdm.go.id/katalog/slims7_cendana-master/repository/robux-for-free-quick-and-easy.pdfIn PDF document text
    • http://library.vsi.esdm.go.id/katalog/slims7_cendana-master/repository/como-hackear-cualquier-juego-de-roblox.pdfIn PDF document text
    • http://library.vsi.esdm.go.id/katalog/slims7_cendana-master/repository/xbox-one-roblox-how-can-i-select-the-free-egg.pdfIn PDF document text
    • http://www.fortinet.com/ve?vn=PDF%2FPhishing.0931%21trIn 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_off0000459b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x459B 26988 bytes
SHA-256: b16ef22dc8a37095259d88248d4c4219ad93bc16bb27dd2cf95ac9f376a139b5
font_01_sfnt_off00008239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8239 18900 bytes
SHA-256: ef067ec4869cddfa445c7d8d3b7f0cc014840e02071a69dc3329ed40c9a28386

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