Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b655642e03e510a…

MALICIOUS

PDF

44.0 KB Created: 2021-05-15 01:01:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 4d8694b7b0e6bb78c593c48c538b4767 SHA-1: 30f81772c89d4e49c61b7a7210094e11f9a9ecba SHA-256: 8b655642e03e510ac0086486803898a8eeeae7b4abece45558325f6c726ff261
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'game hack generator' which redirects to malicious infrastructure. The document also displays a fake CAPTCHA, likely to trick users into interacting with the malicious link. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to lead the user to a compromised site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.xyz/app/406889139/hack-master-coin-pc-game-hack In PDF document text
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/coin-master-unlimited-spin-hack_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/coin-master-on-facebook_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/coin-master-level-4_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/minecraft-packs-free_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/how-to-get-daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/martian-lettuce-coin-master-free_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/get-gold-coin-master-village-hack_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/roblox-e-free_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/free-robux-link_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/coin-master-spin-link-2021_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
stream_003_off000048e9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48E9 24416 bytes
SHA-256: e7382df779121b447f9b190387c8bdecd0272f40551949717df313e391a4180a
font_01_sfnt_off000080d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80D7 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008ac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AC1 17868 bytes
SHA-256: 22b442a55f4ac2138d92a5558ea0ba8cd172fa39c5ed9e426124379d05989e3d

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