Malicious PDF — malware analysis report

Static analysis result for SHA-256 c97ef39e7bcbeae1…

MALICIOUS

PDF

33.8 KB Created: 2021-07-06 10:38:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1dfb9252371b8ca14c9ebcbb66e10d8e SHA-1: 96fb219e33dd6bba19ce66cf220e2048d7c43d0e SHA-256: c97ef39e7bcbeae11f4dfda0683597e3378b5381052141d6968f079277f16f96
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting free in-game currency generators and hacks. The document body and heuristic firings indicate a lure for users to click these links, likely leading to further malware downloads or phishing attempts. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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/431946152/free-robux-com-real-game-hack In PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-robux-code-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-take-someones-group-on-roblox-hack_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/minecraft-hacks-xbox-one_GM479516143.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-robux-only-today-ad_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/mask-black-panther-free-roblox_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/www-robux-redeem_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/microsoft-bing-robux_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-skip-animation-roblox_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/coin-master-ids-for-free-spins_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-minecraft-generator_GM479516143.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-hack-coin-master-spin-in-hindi_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/roblox-hack-jhon-doe_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_off00002f05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F05 21844 bytes
SHA-256: a301af6fb619c271eb3c60c93b9cd4927ed8eb0c2f86c98a5fefd77344e65a3f
font_01_sfnt_off00005ee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE7 19052 bytes
SHA-256: bc7b269ccb6ae3a64d83fc270fb5f4e603085d94a09e100662dabde8c260ece0

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