Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1c97dc701500cc4…

MALICIOUS

PDF

45.7 KB Created: 2021-06-08 12:17:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1465ae57d37f7b26baf1a9a3bba4cac4 SHA-1: 3941149e8602f3dd4d64341e2f4516cafad6d0ef SHA-256: a1c97dc701500cc43619df262594d4d92533d2eb48c568fb8226741d6e1f4bf2
208 Risk Score

Malware Insights

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

This PDF document employs a brand impersonation lure, specifically UPS, to trick users into clicking a link. The link redirects to a malicious domain that offers 'free generator / game hack' content, indicating a likely credential phishing or malware distribution attempt. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 6

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.tw/app/431946152/how-to-get-bear-mask-free-roblox-game-hack.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/how-to-get-bear-mask-free-roblox-game-hack In PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/minecraft-java-code-free_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/coin-master-500-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/roblox-girl-avatar_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-3533-android-hack_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/fan-page-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/coin-master-free-spins-link-download-ios_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/pokemon-go-free-and-nintendo-switch_GM1094591345.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/how-do-you-get-roebucks-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/how-do-you-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/pokemon-go-free-yamask_GM1094591345.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/minecraft-items_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/free-cracked-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-home_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/coin-master-hacks-for-free-spins_GM406889139.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_off0000506c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x506C 27500 bytes
SHA-256: d79e1dbcfdc10e6fc12b300fc2b6b38ee784db7aba58302dba2de839e8349204
font_01_sfnt_off00008e8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E8F 18812 bytes
SHA-256: 02087e69952d51c877b8bf7cb0d885b864fa8e59dabb8a3d6df9fd9170139625

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