Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8310981d0aa3ab0…

MALICIOUS

PDF

47.4 KB Created: 2021-06-13 23:05:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7c60f2a47e8808dc8697c7231f9432f1 SHA-1: b65b3395ec3c73d1095fa1ab1afa35aa1e776483 SHA-256: d8310981d0aa3ab052d1f147350839b8240c2e891d37901b4d7e0f8af216f4fe
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free currency' lures. The primary link directs to a known malicious redirector, indicating a phishing or scam attempt. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/431946152/robux-hack-no-survey-no-download-game-hack In PDF document text
    • http://library.unissula.ac.id/fe/repository/free-robux-wheel_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-fun-hack_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-inappropriate-games_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/minecraft-windows-10-edition-hacked-client_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-get-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/demon-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/pokemon-go-free-versus-pc_GM1094591345.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-hack-roblox-for-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/pro-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-free-spins-and-coins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-robux-really-works-not-youtube_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-get-free-robux-2021-june_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/body-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/inappropriate-roblox-games-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-coin-master-stuff_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
font_00_sfnt_off00004985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4985 28152 bytes
SHA-256: efbc4428d9c1d9a18cbbc7ab5329ea22c86a85a593d68b4042caaa55ae4f49b6
font_01_sfnt_off00008a7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A7E 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off0000942d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x942D 19124 bytes
SHA-256: 47576e593fb6743e131163da87fe6022c65f156d538f3aaf7f0cb63cb8449b7d

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