Malicious PDF — malware analysis report

Static analysis result for SHA-256 573d542e0c9e8055…

MALICIOUS

PDF

35.0 KB Created: 2021-07-03 20:51:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f8f12e3cdec9ec9f8604cea518b7c6eb SHA-1: f50ea7439e1807c98f28fb4f569725d578c08964 SHA-256: 573d542e0c9e80559b8690beeffe2bba1446b6207b31bd742e22e229747797f7
160 Risk Score

Malware Insights

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

The PDF contains embedded links that lead to a known malicious redirector infrastructure, specifically http://netcdn.tw/app/431946152/free-roblox-printables-game-hack. This redirector is likely used to deliver a second-stage payload or lead the user to a phishing site. The document body and heuristics indicate a lure related to game hacks and free items, a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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 http://netcdn.tw/app/431946152/free-roblox-printables-game-hack In PDF document text
    • https://www.e-learning-min1berau.com/__statics/gudangsoal/files/unlimited-robux-hacks_GM431946152.pdfIn PDF document text
    • https://www.e-learning-min1berau.com/__statics/gudangsoal/files/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.e-learning-min1berau.com/__statics/gudangsoal/files/roblox-hack-accounts-cheat-engine_GM431946152.pdfIn PDF document text
    • https://www.e-learning-min1berau.com/__statics/gudangsoal/files/hack-version-of-coin-master_GM406889139.pdfIn PDF document text
    • https://www.e-learning-min1berau.com/__statics/gudangsoal/files/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • https://www.e-learning-min1berau.com/__statics/gudangsoal/files/free-for-mobile-24-com-roblox_GM431946152.pdfIn PDF document text
    • https://www.e-learning-min1berau.com/__statics/gudangsoal/files/roblox-catalog-item-hack_GM431946152.pdfIn PDF document text
    • https://www.e-learning-min1berau.com/__statics/gudangsoal/files/how-to-hack-into-big-brother-roblox_GM431946152.pdfIn PDF document text
    • https://www.e-learning-min1berau.com/__statics/gudangsoal/files/cheats-for-gta-5-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.e-learning-min1berau.com/__statics/gudangsoal/files/free-roblox-clothing-hack_GM431946152.pdfIn PDF document text
    • https://www.e-learning-min1berau.com/__statics/gudangsoal/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • https://www.e-learning-min1berau.com/__statics/gudangsoal/files/roblox-artmoney-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.e-learning-min1berau.com/__statics/gudangsoal/files/how-to-get-free-coins-on-murder-mystery-2-roblox_GM431946152.pdfIn PDF document text
    • https://www.e-learning-min1berau.com/__statics/gudangsoal/files/minecraft-rtx-download-free_GM479516143.pdfIn PDF document text
    • https://www.e-learning-min1berau.com/__statics/gudangsoal/files/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • https://www.e-learning-min1berau.com/__statics/gudangsoal/files/everything-on-the-roblox-catalog-free-fast_GM431946152.pdfIn PDF document text
    • https://www.e-learning-min1berau.com/__statics/gudangsoal/files/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • https://www.e-learning-min1berau.com/__statics/gudangsoal/files/coin-master-fun-hack_GM406889139.pdfIn PDF document text
    • https://www.e-learning-min1berau.com/__statics/gudangsoal/files/roblox-hack-flood-escape-2_GM431946152.pdfIn PDF document text
    • https://www.e-learning-min1berau.com/__statics/gudangsoal/files/free-robux-script_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_off00003296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3296 22328 bytes
SHA-256: d841feb6743f7ebf8aabd0b0605f63039d5cc5b030fb4e55365d2b12e86f2a3c
font_01_sfnt_off000063db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63DB 19028 bytes
SHA-256: 1b1bed31e01b267d37930b89e407ed752ed8ac45c73a01641f66f0431698b544

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