Malicious PDF — malware analysis report

Static analysis result for SHA-256 72f41d84f0915cc3…

MALICIOUS

PDF

33.8 KB Created: 2021-05-24 06:41:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 348149ca96470640604b858925ffdb8d SHA-1: 69ee01a7038657ff5309d312d69665c85d05fdf5 SHA-256: 72f41d84f0915cc340d5679582a5b9d1d6612fe34f24529a770200f263fcc6d9
200 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors and lures the user with a 'free generator / game hack' theme, combined with a 'Click here to download' call to action. The document body and heuristics indicate a social engineering attempt to trick the user into visiting a malicious URL, likely to download a second-stage payload or install unwanted software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9509

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/835599320/free-tiktok-bots-game-hack In PDF document text
    • https://www.ruchya.com.tw/upload/files/free-robux-working_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/coin-master-hacks-for-pet-food_GM406889139.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/complete-offers-for-robux_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/hack-coin-master-apk-32-download_GM406889139.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/is-pokemon-go-fest-free_GM1094591345.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002e62.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E62 23788 bytes
SHA-256: 7c96291b44c0dbebafab034f2d073154b3b5134509e6a4693641bb0c2a73d787
font_01_sfnt_off00006495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6495 17672 bytes
SHA-256: 83a0af7587fde9e4cb54786aef6824729efdfe72bd6282daf62b8eaca0103fce

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