PDF malware analysis — malicious · 89a4fe555614881b

MALICIOUS

PDF

50.0 KB Created: 2021-06-03 15:39:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: c82bbbbeddc148a374da63cf2720aee0 SHA-1: 27e3d71eee71265cd649551786f63c26ffae1754 SHA-256: 89a4fe555614881bf2b59fc00c4f285fd8570572aa6f2b68f827dacae6af5fd1

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including a known malicious redirector, disguised as 'game hacks' and 'free currency'. The document body and heuristics indicate a lure for potentially unwanted or malicious content. While no scripts were explicitly extracted, the nature of the links suggests a potential for JavaScript execution or further payload delivery upon user interaction.

Machine Learning

Nyx PDF Classifier malicious score 0.9734

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.online/app/406889139/real-coin-master-hacks-game-hack In PDF document text
- https://www.jcn.co.uk/uploads/files/files/como-hackear-coin-master-ios_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/hack-coins-in-coin-master_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-spin-rewards_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-hack-2021-without-human-verification_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/robux-robux_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/get-free-robux-now_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/mathep_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-mods-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/gamehunters-coin-master_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/how-to-hack-coins-in-archery-master-3d_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-roblox-clothes-codes_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off0000525e.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x525E	24532 bytes
SHA-256: `8dfd6449fd63866962e251dcda42e54e2e7e6fd3f275ebbe35a969e469d87ffa`
`font_01_sfnt_off00008a8c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8A8C	4028 bytes
SHA-256: `a17c2a746d49ac23b23e38a371e32fddecfcd91b10cf42ff6155bff6b8a07e91`
`font_02_sfnt_off0000982d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x982D	2788 bytes
SHA-256: `6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530`
`font_03_sfnt_off0000a21d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA21D	17788 bytes
SHA-256: `c971b34c329d205054a16b1b5f827a74783bca0f841d374511d085dfea161b8f`

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