Malicious PDF — malware analysis report

Static analysis result for SHA-256 38c8d5182872c6e3…

MALICIOUS

PDF

34.9 KB Created: 2021-07-06 12:26:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 06dd038f6f6ad1f351c46ea84167a0b8 SHA-1: 5129b14b0e465bbdbfb149da47b9b5c9defe668c SHA-256: 38c8d5182872c6e32a01c89b16f101bc41f2586ad87a953652560387276c267c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting game hacks and generators. The primary lure is a link to 'hack-coin-master-online-game-hack', which is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack aimed at driving traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/hack-coin-master-online-game-hack In PDF document text
    • http://digilibfisip.unla.ac.id/repository/scripts-for-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-free-robux-by-join-groups_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-50-spin-link_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/get-robux-free-no-hack_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-hack-free-download-for-android_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-jailbreak-how-to-get-unlimited-free-jailbreak-money_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-roblox-a_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-get-your-acc-back-on-roblox-with-hacking_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-hack-roblox-jailbreak-on-pc_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/is-there-a-way-to-get-free-bobux-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-2021-no-hack-or-survey_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/flee-the-facility-roblox-hack-exploit_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/20210-free-spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/pokemon-go-free-outfits_GM1094591345.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-royale-high-cheats-for-diamonds_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-hack-on-roblox-jail-breaker_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
stream_002_off00003133.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3133 23552 bytes
SHA-256: 35a97880e5de380481e8647082f4366dbe572911768265ff025d6fb13f0a9ae3
font_01_sfnt_off0000668c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x668C 18080 bytes
SHA-256: 91bafde5715f798885b394ac78a801dac3d9f12db2addbe398952484e2592517