PDF malware analysis — malicious · 39fd78378c383000

MALICIOUS

PDF

31.9 KB Created: 2021-07-19 08:08:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23

MD5: d384638dd6b295b26bd61eade44c52d8 SHA-1: 6d2baa53437c9a0433313f94b0a8d7075f67e195 SHA-256: 39fd78378c38300054aaae412f3c494a1357fae8e24aee11d4ae7b4262dfbd2e

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a known malicious infrastructure, specifically advertising free game hacks and generators. The document body includes text and links that reinforce this lure, aiming to trick users into clicking through to potentially harmful content. No scripts were extracted, but the presence of malicious redirector links and the lure indicate a phishing or scam attempt.

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/479516143/minecraft-story-mode-free-game-hack In PDF document text
- https://abouttimetech.com/images/free-tiktok-followers-generator_GM835599320.pdfIn PDF document text
- https://abouttimetech.com/images/free-minecraft-mods_GM479516143.pdfIn PDF document text
- https://abouttimetech.com/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
- https://abouttimetech.com/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
- https://abouttimetech.com/images/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
- https://abouttimetech.com/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
- https://abouttimetech.com/images/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
- https://abouttimetech.com/images/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
- https://abouttimetech.com/images/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
- https://abouttimetech.com/images/free-minecraft-java-edition_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_off000029f4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x29F4	22252 bytes
SHA-256: `de41ccd8eacbb5c19b351e6b8f451ac067c325ddc8aefc5e2b0b0f0d9ec6477a`
`font_01_sfnt_off00005b1f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5B1F	18064 bytes
SHA-256: `5e5fb910f64b2149404149cb3256d61ed755ed43a7017f23b86fa73a2f1502c2`

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