Malicious PDF — malware analysis report

Static analysis result for SHA-256 a019564ef9acf4dc…

MALICIOUS

PDF

50.1 KB Created: 2021-05-12 20:36:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: c62de357ceefef92eee787997914d2d6 SHA-1: eac3fa9dfe9bd44f2b2f5cc71da61eb8ab7d2bdf SHA-256: a019564ef9acf4dc3591af607c713950f0e4424deee73413afbf5ed5daf22f2c
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to websites offering game hacks and free in-game currency, such as Roblox and Coin Master. The heuristic firings indicate that the PDF links to known malicious redirector infrastructure and is part of a link farm designed for SEO manipulation. The primary malicious URL identified is https://netcdn.xyz/app/431946152/roblox-apk-hack-game-hack, which likely serves as a gateway to malware or further phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8594

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.
  • 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.
  • 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/431946152/roblox-apk-hack-game-hack In PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-hack-coin-master-in-pc_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-unlimited-spins-apk-free-download_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-free-spins-iphone-2021_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-adopt-me-free-pets_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-coins-for-flip-master_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/minecraft-aimbot_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/robux-money_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/are-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/what-do-points-do-in-roblox_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-spin-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-spin-hack-trick_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CA6 25568 bytes
SHA-256: 57f9f0311092b07586eb2d777855d7e2f2657565bafd6bc4e61e95a81ed49291
font_01_sfnt_off0000878d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x878D 3964 bytes
SHA-256: f6b9a386ee4e0aff622a98b2230905da71eab0ca98398cb52018fda3528d3e2a
font_02_sfnt_off000094eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94EB 3396 bytes
SHA-256: e59bc53cd4c0ee65dc1533becad2866f345dcb060e6c68bb8187d21cb9f973ee
font_03_sfnt_off0000a0de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0DE 18356 bytes
SHA-256: 7e836b6261bebb63fda2bc6c603fa398fe0a548bc6334e21915c3f4956160db8

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