Malicious PDF — malware analysis report

Static analysis result for SHA-256 51dd958495123d20…

MALICIOUS

PDF

35.5 KB Created: 2021-07-04 16:54:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ae6334b633f466b9ea9307a1a582a1ca SHA-1: bd830772b916a4bd9b76df6f9c5337d03c410f5b SHA-256: 51dd958495123d20fadc881b6fedd086d3a02c5ed872b85c2f25046d7e8b8334
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirector infrastructure, specifically advertising 'free generators' and 'game hacks'. The primary lure URL is http://netcdn.tw/app/406889139/free-spins-coin-master-daily-game-hack. This pattern suggests an attempt to trick users into visiting a site that may lead to credential theft or further malware. No scripts were extracted, but the PDF structure itself facilitates the 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.tw/app/406889139/free-spins-coin-master-daily-game-hack In PDF document text
    • https://elearning.mtsn4jembrana.sch.id/__statics/gudangsoal/files/coin-master-hack-android-no-root_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn4jembrana.sch.id/__statics/gudangsoal/files/www-free-robux-us_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4jembrana.sch.id/__statics/gudangsoal/files/how-to-hack-into-a-group-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4jembrana.sch.id/__statics/gudangsoal/files/vehicle-tycoon-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4jembrana.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-without-human-verification_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn4jembrana.sch.id/__statics/gudangsoal/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn4jembrana.sch.id/__statics/gudangsoal/files/how-to-get-robux-on-roblox-for-free-on-phone_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4jembrana.sch.id/__statics/gudangsoal/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4jembrana.sch.id/__statics/gudangsoal/files/free-minecraft-account_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn4jembrana.sch.id/__statics/gudangsoal/files/coin-master-hack-quora_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn4jembrana.sch.id/__statics/gudangsoal/files/free-robux-mod_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4jembrana.sch.id/__statics/gudangsoal/files/how-to-get-free-gamepasses-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4jembrana.sch.id/__statics/gudangsoal/files/a-wolf-or-other-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4jembrana.sch.id/__statics/gudangsoal/files/coin-master-hack-ios-12_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn4jembrana.sch.id/__statics/gudangsoal/files/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4jembrana.sch.id/__statics/gudangsoal/files/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4jembrana.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4jembrana.sch.id/__statics/gudangsoal/files/roblox-weapons-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4jembrana.sch.id/__statics/gudangsoal/files/beyond-roblox-speed-hacks_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4jembrana.sch.id/__statics/gudangsoal/files/free-super-hros-roblox_GM431946152.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_off00003455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3455 22816 bytes
SHA-256: 910b503d1d458a3b17b233a84c4ea80b864ec367061447f0b01e09da7e44bcdb
font_01_sfnt_off0000675a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x675A 18596 bytes
SHA-256: 5411b9dbca58f16f8af8c21ebe49ba809f0efece3103b9aa7bb9d97b6685b20b

Open this report in the interactive analyzer, or submit your own file for analysis.