Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f2f0260bbfc6335…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 18:07:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 07088b826367458bdbece058d90323a1 SHA-1: 7976668964e644f34389b1a56f6929748caa97c8 SHA-256: 1f2f0260bbfc6335a8b70e59cfdd3a52356ba583155f501445d1795245ec26da
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are SEO-optimized and appear to be part of a link farm. The primary lure is 'game hacking' content, specifically for Roblox and Coin Master, redirecting users to suspicious URLs like http://netcdn.tw/app/431946152/how-to-hack-roblox-for-robux-game-hack. This pattern suggests the document is designed to drive traffic to malicious sites, likely for phishing or distributing further malware. No scripts were extracted, but the PDF structure and embedded links are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/431946152/how-to-hack-roblox-for-robux-game-hack PDF link annotation
    • https://edu.mtsannajah.sch.id/__statics/gudangsoal/files/minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • https://edu.mtsannajah.sch.id/__statics/gudangsoal/files/tiktok-free-roblox-accounts_GM835599320.pdfIn PDF document text
    • https://edu.mtsannajah.sch.id/__statics/gudangsoal/files/how-many-levels-in-coin-master_GM406889139.pdfIn PDF document text
    • https://edu.mtsannajah.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-royale-high_GM431946152.pdfIn PDF document text
    • https://edu.mtsannajah.sch.id/__statics/gudangsoal/files/roblox-popular-hacker_GM431946152.pdfIn PDF document text
    • https://edu.mtsannajah.sch.id/__statics/gudangsoal/files/free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • https://edu.mtsannajah.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • https://edu.mtsannajah.sch.id/__statics/gudangsoal/files/free-roblox-wings_GM431946152.pdfIn PDF document text
    • https://edu.mtsannajah.sch.id/__statics/gudangsoal/files/coin-master-hack-tool-apk-download_GM406889139.pdfIn PDF document text
    • https://edu.mtsannajah.sch.id/__statics/gudangsoal/files/roblox-admin-hack-script_GM431946152.pdfIn PDF document text
    • https://edu.mtsannajah.sch.id/__statics/gudangsoal/files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://edu.mtsannajah.sch.id/__statics/gudangsoal/files/minecraft-maps-pe-free-download_GM479516143.pdfIn PDF document text
    • https://edu.mtsannajah.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • https://edu.mtsannajah.sch.id/__statics/gudangsoal/files/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • https://edu.mtsannajah.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • https://edu.mtsannajah.sch.id/__statics/gudangsoal/files/how-do-you-get-the-hack-no-roblox_GM431946152.pdfIn PDF document text
    • https://edu.mtsannajah.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://edu.mtsannajah.sch.id/__statics/gudangsoal/files/how-many-levels-are-in-coin-master_GM406889139.pdfIn PDF document text
    • https://edu.mtsannajah.sch.id/__statics/gudangsoal/files/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • https://edu.mtsannajah.sch.id/__statics/gudangsoal/files/coin-master-free-blogspot_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_off0000300f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x300F 22140 bytes
SHA-256: 582a0f68668db55ec5a8c00260171e4170fd2196de87b808dbd6ea9010b21fe2
font_01_sfnt_off0000613a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x613A 19124 bytes
SHA-256: 9f0d208e26822d6a242fed99df9fbfacecc5a4ec77afd90406185fcaa2ab8822

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