Malicious PDF — malware analysis report

Static analysis result for SHA-256 a91674f1c450931a…

MALICIOUS

PDF

34.6 KB Created: 2021-06-21 20:03:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: eaa0936bf7aac9b484d54a1bdfa7b464 SHA-1: 275f206f1bd412dfe3f6644b664e2a830e723663 SHA-256: a91674f1c450931ae9ca44cd8ddbb4c184874e706a24f86ba02b71daeed2e7d1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting 'free generator / game hack' lures. The document body and heuristics indicate a phishing attempt disguised as a game hack generator, aiming to trick users into visiting a malicious URL. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/431946152/free-robux-discord-game-hack In PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/robux-hacks-no-serves_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/coin-master-hacks-for-android_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/minecraft-dungeons-free-download-pc_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/get-free-roblox-coins_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/instant-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-generator-no-verification_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/comment-hack-des-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/free-realistic-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/coin-master-email-rewards_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/coin-master-hack-online-cheat_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/cheat-code-sonic-new-map-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/facebook-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/minecraft-pocket-edition-free-apk_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/free-spin-link-for-coin-master-game_GM406889139.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
font_00_sfnt_off0000316b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x316B 21864 bytes
SHA-256: 219474c8e8937302c9603fb490760af7cd3499a359687ed0a51c9d8470ff6322
font_01_sfnt_off000061b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B2 19176 bytes
SHA-256: 020ce166f16710322681f054c1b4dde0a486d6154bce33e9144977aac3b53b16

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