Malicious PDF — malware analysis report

Static analysis result for SHA-256 3501327ed66f33df…

MALICIOUS

PDF

44.8 KB Created: 2021-06-03 05:51:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: bfee3b46774829ce97f283822e3f089f SHA-1: f7ad45fd2382e7c11fdb048b580596601c16a1db SHA-256: 3501327ed66f33df229e525e79dfb2cf1d67f4f3646287a696a9dfb1c7ddda9b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a redirector URL, which is associated with 'free generator' and 'game hack' lures. The ML classifier also flagged this PDF as malicious. The presence of embedded URLs and the nature of the lures suggest an attempt to direct users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/free-robux-real-game-hack In PDF document text
    • http://abdinusababellibrary.ac.id//repository/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/how-to-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/wurst_GM479516143.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/pokemon-go-free-candy-hack_GM1094591345.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/free-redeem-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id/repository/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/robux-sites_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/oprewards-robux_GM431946152.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/free-spins-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/coin-master-spin-ml_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://abdinusababellibrary.ac.id//repository/coinmaster-links_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_off00004fe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FE7 25772 bytes
SHA-256: aab57f99ded395f1eb9b205961d3ba5f0f4ccdc4964618777ac6a700f13f19e4
font_01_sfnt_off00008c5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C5E 18316 bytes
SHA-256: 0bff543ee19f4ca1641aaad3399cdc0a52c610caf2abd08cd8655404047fbeff

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