PDF malware analysis — malicious · 5bc7e4ca08cb53e2

MALICIOUS

PDF

33.1 KB Created: 2021-07-19 04:13:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 1fe04ebddcd17eb748bfdcc1b7ed29b0 SHA-1: df4921de571658d698dcd3c26ecc39cc4fceb1e9 SHA-256: 5bc7e4ca08cb53e2ddee601901e8fc2306430c5a7ba323a5e7dd10e8bb09ff03

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically advertising "free generator / game hack" lures. The document body and embedded URLs strongly suggest a phishing attempt to trick users into visiting potentially harmful sites. No scripts were extracted, but the presence of malicious redirectors and the lure content indicate a high likelihood of a phishing or scam campaign.

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/406889139/100-free-spins-coin-master-game-hack In PDF document text
- https://koeltotaal.com/images/free-tiktok-followers-instantly_GM835599320.pdfIn PDF document text
- https://koeltotaal.com/images/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
- https://koeltotaal.com/images/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://koeltotaal.com/images/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
- https://koeltotaal.com/images/coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://koeltotaal.com/images/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
- https://koeltotaal.com/images/free-robux-exe_GM431946152.pdfIn PDF document text
- https://koeltotaal.com/images/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
- https://koeltotaal.com/images/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
- https://koeltotaal.com/images/how-to-get-minecraft-windows-10-for-free-2021_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_off00002cfc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2CFC	22676 bytes
SHA-256: `378014ddd228e2873688c826f6a962258cdb9ec48185ac71dfea7c7d878a1600`
`font_01_sfnt_off00005fb0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5FB0	18164 bytes
SHA-256: `9bc61af2acbda784231945e40c4a4bb5d6810b0d04641be6b37b2cdd3c5b78bc`

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