Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4d88b896884e66a…

MALICIOUS

PDF

41.8 KB Created: 2021-05-15 04:31:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 92e6ea4200a9bbf8bdac178c96cffa1b SHA-1: a46156772b3adbd1e0f7045a9b3f5aecc60738b4 SHA-256: e4d88b896884e66a3411faf55ba0af3a3ece4288393b69f983e55649dcff5fd2
260 Risk Score

Malware Insights

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

This PDF file contains numerous links designed to redirect users to malicious websites, masquerading as game hacks or generators. The primary redirector URL is 'https://netcdn.xyz/app/479516143/androeed-ru-minecraft-game-hack', which is also used in a brand impersonation lure for Facebook. The document body, though heavily obfuscated, contains references to these lures and embedded URLs, suggesting an attempt to exploit user interest in free in-game items or cheats to deliver a payload or phish for credentials. No scripts were extracted, but the PDF structure and embedded links strongly indicate a malicious intent to drive users to compromised or malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.xyz/app/479516143/androeed-ru-minecraft-game-hack.
  • 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/479516143/androeed-ru-minecraft-game-hack In PDF document text
    • https://e-learning.manurulhuda-csp.sch.id/__statics/gudangsoal/files/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.manurulhuda-csp.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • https://e-learning.manurulhuda-csp.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • https://e-learning.manurulhuda-csp.sch.id/__statics/gudangsoal/files/free-coins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • https://e-learning.manurulhuda-csp.sch.id/__statics/gudangsoal/files/free-roblox-scripts_GM431946152.pdfIn PDF document text
    • https://e-learning.manurulhuda-csp.sch.id/__statics/gudangsoal/files/coin-master-haktuts_GM406889139.pdfIn PDF document text
    • https://e-learning.manurulhuda-csp.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://e-learning.manurulhuda-csp.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-xbox-360_GM479516143.pdfIn PDF document text
    • https://e-learning.manurulhuda-csp.sch.id/__statics/gudangsoal/files/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://e-learning.manurulhuda-csp.sch.id/__statics/gudangsoal/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://e-learning.manurulhuda-csp.sch.id/__statics/gudangsoal/files/100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning.manurulhuda-csp.sch.id/__statics/gudangsoal/files/is-minecraft-java-free_GM479516143.pdfIn PDF document text
    • https://e-learning.manurulhuda-csp.sch.id/__statics/gudangsoal/files/can-you-earn-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.manurulhuda-csp.sch.id/__statics/gudangsoal/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://e-learning.manurulhuda-csp.sch.id/__statics/gudangsoal/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning.manurulhuda-csp.sch.id/__statics/gudangsoal/files/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning.manurulhuda-csp.sch.id/__statics/gudangsoal/files/free-coins-coin-master-link-today_GM406889139.pdfIn PDF document text
    • https://e-learning.manurulhuda-csp.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://e-learning.manurulhuda-csp.sch.id/__statics/gudangsoal/files/minecraft-free-play-now_GM479516143.pdfIn PDF document text
    • https://e-learning.manurulhuda-csp.sch.id/__statics/gudangsoal/files/how-to-get-free-coins-and-free-spins-coin-master_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_off00004b6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B6F 24052 bytes
SHA-256: d969f9a74010fa4fed081e606860c52a26d3827256fb4eea4e18f0b05717e254
font_01_sfnt_off000081ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81EE 18024 bytes
SHA-256: d77f23eb406fbdbcc7d1895b5a23e167f495e6594edd92a4e1ae302dec94c325

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