Malicious PDF — malware analysis report

Static analysis result for SHA-256 22ff0de2424815d3…

MALICIOUS

PDF

49.4 KB Created: 2021-06-03 20:14:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1abce895f77d17b6e033d78670bf2a10 SHA-1: 11669e63a9ea575c95eb6ed880a8ab8cc8459c25 SHA-256: 22ff0de2424815d33dcdf066886ed7d413e233484cc8da1b92f3f7134832f6ea
142 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.online/app/406889139/coin-master-today-game-hack PDF link annotation
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/how-to-add-mods-to-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-glitch_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/coin-master-free-attack_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/free-vip-server-roblox_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/hack-coin-master-ios-download_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021-twitter_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/pokemon-go-free-remote-raid-pass_GM1094591345.pdfIn PDF document text
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/free-minecraft-mods-for-pc_GM479516143.pdfIn PDF document text
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/free-robux-website_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/mcpe_GM479516143.pdfIn PDF document text
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/oprewards-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000056f0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x56F0 27536 bytes
SHA-256: 8c849553216308a9b2fbeffda4b6d66900ea3b65d7a9347b055c828bbac55ddd
font_01_sfnt_off000095b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95B7 2884 bytes
SHA-256: f9d1f73c99ac19e1fa9dba4eb5e90eabc47451d72c930a2b8abf3a4aec2ebdc9
font_02_sfnt_off00009f9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F9A 17900 bytes
SHA-256: 4d8f4d30bf6ed32ab69c0e3c6b9d13f3aedccf41ef86a94604d61125f9e6c526

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