PDF malware analysis — malicious · e553988c938b073a

MALICIOUS

PDF

33.3 KB Created: 2021-07-19 07:30:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16

MD5: ae5197a7c3cdc9ea51ddfb344972a052 SHA-1: 39b20a87ae6908e083eca4b8dcfca8a465ddf196 SHA-256: e553988c938b073aecb6d0e80a10388aa86cd0ae7a43f596a7ec83bbcbe42f2c

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, including one to a known malicious redirector at http://netcdn.tw/app/406889139/coin-master-free-cards-game-hack. The document body and heuristics indicate a lure for game-related cheats or currency, designed to trick users into clicking the malicious link. No scripts were extracted, but the presence of embedded URLs and the lure suggest a phishing or redirection attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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/coin-master-free-cards-game-hack In PDF document text
- http://www.eurologistiki.gr/images/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
- http://www.eurologistiki.gr/images/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
- http://www.eurologistiki.gr/images/free-robux-hack-generator_GM431946152.pdfIn PDF document text
- http://www.eurologistiki.gr/images/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
- http://www.eurologistiki.gr/images/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
- http://www.eurologistiki.gr/images/freer-tiktok_GM835599320.pdfIn PDF document text
- http://www.eurologistiki.gr/images/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
- http://www.eurologistiki.gr/images/free-minecraft-website_GM479516143.pdfIn PDF document text
- http://www.eurologistiki.gr/images/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
- http://www.eurologistiki.gr/images/free-robux-cards_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
`font_00_sfnt_off00002c01.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2C01	23440 bytes
SHA-256: `9cd823d1f8a1013a068981d738a1b972e6f1bee45d6d69936848e8c4b5ed2ace`
`font_01_sfnt_off0000613b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x613B	17884 bytes
SHA-256: `dce98ab1a9f6331dfaabbdd57dacdba92c66b57249d10e9c2a1df39138c2a47b`

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