PDF malware analysis — malicious · 2cfadeb4ab93ea6b

MALICIOUS

PDF

43.7 KB Created: 2021-05-19 07:00:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31

MD5: 42cff229cce107a47db8324775818358 SHA-1: fcbbe916d36b6baf219f41e7aca9f7a8c169666b SHA-256: 2cfadeb4ab93ea6bc8cae194a2bfb9f1b34efddbec7a22a9f1a1986342ec6339

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users into clicking on a "free generator / game hack" for Roblox, which redirects to known malicious infrastructure. The document body and embedded links strongly suggest a phishing or scam attempt to drive traffic to potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

Nyx PDF Classifier malicious score 0.9969

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.
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.
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/how-to-get-free-robux-on-roblox-2021-game-hack In PDF document text
- http://uptperpustakaan.unismabekasi.ac.id/katalog-buku//repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
- http://uptperpustakaan.unismabekasi.ac.id/katalog-buku//repository/free-robux-today_GM431946152.pdfIn PDF document text
- http://uptperpustakaan.unismabekasi.ac.id/katalog-buku//repository/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
- http://uptperpustakaan.unismabekasi.ac.id/katalog-buku//repository/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
- http://uptperpustakaan.unismabekasi.ac.id/katalog-buku//repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
- http://uptperpustakaan.unismabekasi.ac.id/katalog-buku//repository/get-free-robux-today_GM431946152.pdfIn PDF document text
- http://uptperpustakaan.unismabekasi.ac.id/katalog-buku//repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
- http://uptperpustakaan.unismabekasi.ac.id/katalog-buku//repository/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
- http://uptperpustakaan.unismabekasi.ac.id/katalog-buku//repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
- http://uptperpustakaan.unismabekasi.ac.id/katalog-buku//repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
- http://uptperpustakaan.unismabekasi.ac.id/katalog-buku//repository/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
- http://uptperpustakaan.unismabekasi.ac.id/katalog-buku//repository/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
- http://uptperpustakaan.unismabekasi.ac.id/katalog-buku//repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- http://uptperpustakaan.unismabekasi.ac.id/katalog-buku//repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
- http://uptperpustakaan.unismabekasi.ac.id/katalog-buku//repository/how-to-hack-robux_GM431946152.pdfIn PDF document text
- http://uptperpustakaan.unismabekasi.ac.id/katalog-buku//repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
- http://uptperpustakaan.unismabekasi.ac.id/katalog-buku//repository/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
- http://uptperpustakaan.unismabekasi.ac.id/katalog-buku//repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
- http://uptperpustakaan.unismabekasi.ac.id/katalog-buku//repository/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
- http://uptperpustakaan.unismabekasi.ac.id/katalog-buku//repository/how-to-hack-to-get-robux_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.

Filename	Kind	Source	Size
`stream_003_off00004a36.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4A36	27132 bytes
SHA-256: `95754275d42ecd4bf991090c5207c4da4230975d7e84d4edac61ae695779d76c`
`font_01_sfnt_off000086be.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x86BE	18756 bytes
SHA-256: `57ee29ca2df633c9559bea9da81b447a7ef2e0dffb4d388bdd233aaad46b31ec`

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