Malicious PDF — malware analysis report

Static analysis result for SHA-256 d17094670952bf2d…

MALICIOUS

PDF

47.5 KB Created: 2021-06-03 20:00:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 692cd6d7eb6a6ccb682e5b12c69ffae4 SHA-1: a786caf3bace410f29db4d368817f055214c8304 SHA-256: d17094670952bf2ded48743cb76cd9dd79dc4a3ef0040cf0e82c51e033f142df
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains lures for game hacks and free items, directing users to a known malicious redirector. This redirector, in turn, hosts multiple other malicious PDFs, indicating a chain of malicious content delivery. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.online/app/431946152/roblox-free-bundles-game-hack In PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-free-rewards-link_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/robux_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-face-roblox_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/http-blackgamesus-coinmasterhack_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/minecraft-free_GM479516143.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-robux-website_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/roblox-adopt-me-free-pets_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-roblox-girl-hair-not-a-model_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-free-cards-link-2021_GM406889139.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
stream_004_off00005234.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5234 25276 bytes
SHA-256: dffb11858dd3f7ad1bc40c38df99f060d4469c80101ff8ba552d9a88a0f37b19
font_01_sfnt_off00008c04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C04 3120 bytes
SHA-256: 49734f51977507cba6bc8d3ad0cee0363aa119856db094427deb9cf565bb7bca
font_02_sfnt_off00009718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9718 18260 bytes
SHA-256: ed73f26fe39a6ceec3b8cb9f78cb2769c99c91aa7d74f7e016d55c21fe231794

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