Malicious PDF — malware analysis report

Static analysis result for SHA-256 739be3746beb4274…

MALICIOUS

PDF

48.0 KB Created: 2021-06-09 16:36:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e75c17c23327c89da725c412227b789d SHA-1: 9c5a70de29d6b85c552a22275d9860f2555540e1 SHA-256: 739be3746beb42740d2142816501cb8efdd6a861ac60d61cfb844c509995d0ba
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors, specifically advertising free game hacks and generators. The primary lure URL is https://netcdn.tw/app/431946152/change-your-roblox-name-for-free-game-hack. While no scripts were extracted, the PDF structure and embedded links strongly suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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.tw/app/431946152/change-your-roblox-name-for-free-game-hack In PDF document text
    • http://lib.fisipumt.ac.id/repository/robux-generator-that-works_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-roblox-money-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-to-get-more-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-hack-unlimited-robux-apk-download_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/worst-client_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/mcpe-master-hack-unlimited-coins-download_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-spins-and-coins-com_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/robloxhacks_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spins-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-roblox-intros_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-many-levels-does-coin-master-have_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-foxy-food_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-hack-here_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/instagram-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-tiktok-hands-free_GM835599320.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000054e1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54E1 28964 bytes
SHA-256: 5642f64ac8fd6970c52f7be1d2083c1981d31242d17c5aa44acd2c3121997a65
font_01_sfnt_off000096e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96E7 19192 bytes
SHA-256: 8948c7374088abda112b690a7840f9b99ef05832cfbd133abdd26e10a574742a

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