Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e67a7bd0695287a…

MALICIOUS

PDF

35.7 KB Created: 2021-07-06 02:42:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a282f5aabff19fa3a9c2e319b03e5e91 SHA-1: 408d7c5029938737ca82543070e7edcf401e068b SHA-256: 6e67a7bd0695287a72366efc060ee2ab0f6db1c045dfa2deddead61bb798f2db
142 Risk Score

Malware Insights

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

The PDF document contains multiple external links, including one to a 'free generator / game hack' lure. It also exhibits characteristics of a PDF link farm, with numerous links pointing to other PDF files hosted on external domains. The ML classifier strongly indicated maliciousness, and the overall structure suggests a campaign to drive traffic to these external sites, likely for SEO manipulation or to host further malicious content.

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-skin-packs-game-hack PDF link annotation
    • http://library.apsidoarjo.ac.id//repository/www-coin-master-hack-com_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/hack-xp-net-coin-master_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-limited_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/what-do-roblox-points-do_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/robuxe-gratuit-site-de-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/instagram-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/linkmon-free-robux-website_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-buying-roblox-pastebin_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/computer-robloxs-hacks-for-lumber-tycoon_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-no-add-ons_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/hack-roblox-robux-without-playing-games_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-make-clothes-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/robux-sites_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-without-veriufication-new_GM431946152.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_off00003709.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3709 22660 bytes
SHA-256: 0022f01c556cafb29aebd98765b4495f76b492f5d0565e370ff5296909aef521
font_01_sfnt_off0000695b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x695B 18180 bytes
SHA-256: af546ec7d16cdc8db8a545ddb361d3216713a52e8bef528030956627ce368622

Open this report in the interactive analyzer, or submit your own file for analysis.