PDF malware analysis — malicious · 755290eb90b4d5c5

MALICIOUS

PDF

43.9 KB Created: 2021-04-26 08:51:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21

MD5: a0d728fa3ac3d40852660e2c7f7f0f08 SHA-1: 11d1b802f9e40859911110980235a10cbb2e88a1 SHA-256: 755290eb90b4d5c51e58af0c13d0d3d7cbfcec47e968fb78c654b21177920802

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack lure, directing users to a known malicious redirector. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting the malicious site. While no scripts were explicitly extracted, the PDF structure and the nature of the lure suggest an attempt to lead the user to a malicious download or exploit.

Machine Learning

Nyx PDF Classifier malicious score 0.9868

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 https://netcdn.xyz/app/431946152/hack-version-of-the-game-apk-roblox-free-robux-game-hack In PDF document text
- https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/free-online-play-roblox.pdfIn PDF document text
- https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/roblox-free-roam-games-grand-blox.pdfIn PDF document text
- https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/free-robux-no-download-no-human-verification-2021.pdfIn PDF document text
- https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/omo-recuperar-una-uenga-hacker-en-roblox.pdfIn PDF document text
- https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/free-attack-doge-roblox.pdfIn PDF document text
- https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/free-roblox-hack-2021.pdfIn PDF document text
- https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/veil-roblox-hack-paid.pdfIn PDF document text
- https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/roblox-da-hood-hack-download.pdfIn PDF document text
- https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/how-to-gte-free-robux-2021-still-work.pdfIn PDF document text
- https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/free-roblox-gamepasses-script.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.

Filename	Kind	Source	Size
`stream_003_off00004137.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4137	26200 bytes
SHA-256: `5be1381d4113aad3c7acc221a85771fcee55535580d7601dd1b0b8308b837b4e`
`font_01_sfnt_off00007d14.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7D14	2832 bytes
SHA-256: `77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2`
`font_02_sfnt_off000086c5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x86C5	19340 bytes
SHA-256: `8be495a105f025ceaac8bf72ffef862abf81d204843e3bb64cd179c2adfd5956`

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