Malicious PDF — malware analysis report

Static analysis result for SHA-256 52eb40bf384cbdd8…

MALICIOUS

PDF

45.8 KB Created: 2021-06-03 10:44:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a4d8a31a24fcfd667d38ad1fd1ad04e1 SHA-1: 639b4341aa5bd8ac5be04550c340da56045af24e SHA-256: 52eb40bf384cbdd81a88c4617928c855bf968b760e9dcd90110cf0a3fac93a6f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure for game hacks and free generators, directing users to malicious redirector infrastructure. The document body contains multiple embedded URLs that lead to these lures, and the ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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/406889139/free-coin-master-spins-blog-game-hack In PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/pokemon-go-free-677_GM1094591345.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-hack-apk-link_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/how-to-get-fre-robux-on-a-computer_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-daily-link_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-twitter-free-spins_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-card-collection-in-coin-master_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_off00004d76.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D76 25140 bytes
SHA-256: e90ccc35bbec1ec70fe04c47c0de63f546806cd99bfb4fd6edcc22dfea18c500
font_01_sfnt_off000085e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85E7 2824 bytes
SHA-256: a0d6c1ef1f7405ab05245801e4abbc2877925f97898db53811df9ab010e978fa
font_02_sfnt_off00008f85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F85 18464 bytes
SHA-256: a2c76306a813766f02d16bba13a6176cc917de49c90529db8e6e2ffa1e8149db

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