PDF malware analysis — malicious · fae0d1f19a6a4a70

MALICIOUS

PDF

32.9 KB Created: 2021-07-21 23:01:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11

MD5: f1ab9d0d45e8aca6d34fd65f1dcaeeaf SHA-1: 1a192d3cb9c5825f4f58d693b8d772507c9081be SHA-256: fae0d1f19a6a4a70efc87fbe5affc42c71077732c8dfb128cb92c82c1830b51a

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links to known malicious redirector infrastructure, specifically http://netcdn.tw/app/431946152/how-to-get-free-robux-codes-game-hack. The document body and embedded links are designed to lure users into clicking these links by promising free in-game currency or hacks. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves social engineering to drive users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9900

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/how-to-get-free-robux-codes-game-hack In PDF document text
- https://kierowcyhgv.uk/images/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
- https://kierowcyhgv.uk/images/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
- https://kierowcyhgv.uk/images/free-tiktok-bots_GM835599320.pdfIn PDF document text
- https://kierowcyhgv.uk/images/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
- https://kierowcyhgv.uk/images/minecraft-story-mode-free_GM479516143.pdfIn PDF document text
- https://kierowcyhgv.uk/images/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
- https://kierowcyhgv.uk/images/free-robux-without-verification_GM431946152.pdfIn PDF document text
- https://kierowcyhgv.uk/images/free-minecraft-skin-maker_GM479516143.pdfIn PDF document text
- https://kierowcyhgv.uk/images/hack-tiktok-fans-free_GM835599320.pdfIn PDF document text
- https://kierowcyhgv.uk/images/minecraft-free-download-windows-10_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.

Filename	Kind	Source	Size
`font_00_sfnt_off00002bb7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2BB7	22396 bytes
SHA-256: `3287cb36cd2121576978fcfdff2726ee8787f9db3e234c35dd9ff4086109e38f`
`font_01_sfnt_off00005d20.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5D20	18640 bytes
SHA-256: `717d8f6a8bc593f0af8780c548dc1efbcecb7787422593aa31f0cce5729e7174`

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