Malicious PDF — malware analysis report

Static analysis result for SHA-256 66f1722f94d7ad90…

MALICIOUS

PDF

34.4 KB Created: 2021-06-20 09:33:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 21d7a3c4296a082746001fef1fc835ad SHA-1: ca3687e09a1ee66c0d71a4f4eec360f6eb0e589d SHA-256: 66f1722f94d7ad90796da1dd687bcce4f000ccf551670133ddf8058984046a17
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one that redirects to malicious infrastructure, masquerading as a game hack generator. The document body and heuristics indicate a lure for game-related cheats, likely intended to lead users to a phishing or malware download site. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 http://netcdn.co/app/431946152/hack-cheat-robux-game-hack In PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/how-to-hack-roblox-with-hydra_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/free-minecraft-texture-packs-java_GM479516143.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/coin-master-no-download-app-but-play-for-free_GM406889139.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/coin-master-hack-apk-latest-version-2021_GM406889139.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/roblox-november-2021-hacks-1-day-ago_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/get-me-robux_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/free-roblox-intros_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/coin-master-3533-android-hack_GM406889139.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/how-to-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/free-roblox-accounts-with-robux-that-work-not-banned-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
font_00_sfnt_off00002fb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FB9 22348 bytes
SHA-256: e6f6c1296a88372e3b93ffc8e5d84f80aee9ea2b71d61f2a9f40f67803d11511
font_01_sfnt_off0000615b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x615B 18992 bytes
SHA-256: e34431ba64e58bdda9f45f5c30e280e47c13bbffb7bfb5e726dc9e1f1f83ee61