PDF malware analysis — malicious · de95e99034ff4a81

MALICIOUS

PDF

48.2 KB Created: 2021-06-03 14:49:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16

MD5: 139a2f14a54d3f2c434136a68fac1ff3 SHA-1: 1e9f124fe05e4a22f9c9c66059bb618e2dba588f SHA-256: de95e99034ff4a81436393c353bbc499ffd983465f742a14f5dfa50d32eafc2d

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous links designed to lure users into downloading game-related cheats or items, with one primary link pointing to a known malicious redirector. The document body and heuristics indicate a scam or phishing attempt, likely to lead to malware distribution or credential harvesting. No scripts were extracted, but the embedded URLs and link farm structure strongly suggest a malicious intent to redirect users to harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9796

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/479516143/minecraft-pe-free-download-android-game-hack In PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-hack-pc-cheat-engine_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/tiktok-free-vpn_GM835599320.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/blogger-coin-master-free-spins_GM406889139.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/free-robux-codes-2021_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-minecraft-java-edition-account_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-free-spin-link-today-50_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-hack-spins-android_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/minecraft-games-free-to-play-online_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/roblox-password-hacker_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-coin-master-spins-link-facebook_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/op-rewards-robux_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-robux-hack-no-human-verification_GM431946152.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_004_off000055e2.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x55E2	25416 bytes
SHA-256: `93147ac362f974b19b7612ea277cbe37296558ed91b773a69a36708d0f1848e4`
`font_01_sfnt_off00008eef.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8EEF	3056 bytes
SHA-256: `dd24a0ab94df4552e459bd06fd01b0fd3f021c1d51d1d64407070e735974a028`
`font_02_sfnt_off00009961.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9961	18444 bytes
SHA-256: `5a97249ab99b3f405ba8447d6660054b6d961bf679fd2328fdd0c5e86c70ec7d`

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