Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1ec3fa2e82d2fd1…

MALICIOUS

PDF

34.9 KB Created: 2021-06-29 19:48:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 318a6cb6529a4df6856d34220a8adc3d SHA-1: d93ea4c14026bc68b41d7b6f89b72d389f689c2f SHA-256: b1ec3fa2e82d2fd135ce034bf759f9b5c063fcf0d20dc159be832a7fc1169ed5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one that redirects to malicious infrastructure advertising game hacks and free currency. The document body and heuristics indicate a lure for potentially unwanted or malicious downloads. While no scripts were explicitly extracted, the nature of the links and the lure suggest an attempt to redirect users to a site that may host further malicious content or exploit kits.

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.co/app/406889139/free-coin-master-coins-and-spins-game-hack In PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux-with-jus-tusername_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-how-to-get-free-followers_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-tiktok-followers-generator_GM835599320.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-rc7-hack-download_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-hack-teleport-in-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/armored-patrol-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/group-gives-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/hack-conteur-blox-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux-generator-no-survey-no-verification_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/hack-de-allah-akabar-roblox-download_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/robuxian-com-free-robux-code_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-minecraft-for-kids_GM479516143.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-report-hack-on-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-get-free-robux-in-roblox-november-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-builders-club-free-download_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-parkour-point-hack_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/hack-roblox-ipod_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-roblox-accounts-no-pin-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_off00003336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3336 22508 bytes
SHA-256: 3dfab30686f724e994435239582b43551095f4490a12970bccf16b400a9d1328
font_01_sfnt_off0000658c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x658C 18348 bytes
SHA-256: cc12283f691ecd9c6c4381c5355a15c3235cfa1ea9601b68c1f91d3883d88a7b

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