Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0631d0631f9881a…

MALICIOUS

PDF

35.1 KB Created: 2021-06-25 17:01:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ec3d3e173f80e98ce8ec604253755742 SHA-1: aaf541f77907af33c2699716bdd1fd3beb16d1fd SHA-256: a0631d0631f9881aab270fe77971abf1b2d2ef4d93c60a8b3c188a4d519abf4c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, disguised as offers for free game items like Roblox gift cards. The primary lure is 'free-roblox-gift-cards-2021-game-hack' which resolves to http://netcdn.co/app/431946152/free-roblox-gift-cards-2021-game-hack. This suggests a phishing or scam campaign aimed at tricking users into visiting malicious sites. No scripts were extracted, but the embedded URLs and the nature of the lure strongly indicate a malicious intent to redirect users to potentially harmful content.

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-roblox-gift-cards-2021-game-hack In PDF document text
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/free-robux-virus_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/how-to-get-free-shirts-roblox-bc_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/hackear-net-roblox_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/tener-robux-gratis-hack_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/roblox-hacks-for-arsenal_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/minecraft-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/hacks-roblox_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/how-to-use-an-illuminati-skybox-hack-on-roblox_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/free-roblox-redeem-codes-10_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/hack-roblox-robux-2021_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/free-robux-and-builders-club-legal_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/free-robux-today_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/roblox-money-hack-mad-city-2021-safe_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_off00003103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3103 22428 bytes
SHA-256: bf7534a086cb173d717b3d4cd5ffcf9e77cfc9ebaa26aa21a1b1139a7deee12c
font_01_sfnt_off000062c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C9 19452 bytes
SHA-256: 8115ccb621edd4612311f62a2018219b20574293e23f0c1b138e5e1805582403

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