Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee78ab246fa7d9b3…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 21:36:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f7ba049114bfe7fd5ea3fdeaa3c00a56 SHA-1: 05524dd4929b01c643b97753a1e9307a604b11c8 SHA-256: ee78ab246fa7d9b3b21c4359ef6dcb4d95a572851ea25131bbea30c28be1833e
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document employs a lure of free game items and hacks to entice users to click on external links. The document functions as a link farm, directing users to numerous other PDF files hosted on external domains, likely for SEO manipulation or to distribute further malicious content. The primary malicious activity observed is the redirection to a network of potentially harmful websites.

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/479516143/free-minecraft-capes-game-hack PDF link annotation
    • http://library.umuslim.ac.id//repository/fbchampion-com_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/get-anything-free-catalog-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/tricky-nicky-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-do-you-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-get-free-robux-without-using-personal-information_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-horror-tycoon-hack-script_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/pokemon-go-free-hack-ios_GM1094591345.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-roblox-ad-design_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/comment-hacker-le-cataloggue-de-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-roblox-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-100-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/robux-hack-download-no-verification_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/robux-hack-wish_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-hack-twitter_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-minecraft-skin-creator_GM479516143.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_off0000333d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x333D 22516 bytes
SHA-256: 2ff819e9cb30c12f08062758858abbaca776cf360ded2bc447ac7577cbf8734a
font_01_sfnt_off0000651e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x651E 18032 bytes
SHA-256: 1e862981e003b551836a585810ec825e70eaac9e05fbd38dc5ef0e36a4934143

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