PDF malware analysis — malicious · 93dbb6db05b07c35

MALICIOUS

PDF

34.5 KB Created: 2021-07-19 12:03:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22

MD5: 53f62b0f2542c98c46053eaee6dfeb6b SHA-1: 5adab88aae171daf1382f39e1adc19584de7bd76 SHA-256: 93dbb6db05b07c353eb2dddd467d0f94305ec38b92b4a5ffc2829eeca68a50d3

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to known malicious redirectors and lures users with game-related cheats. The primary malicious URL identified is http://netcdn.tw/app/479516143/how-to-get-a-cape-in-minecraft-for-free-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a malicious redirector chain designed to deliver a second-stage payload or phish for credentials.

Machine Learning

Nyx PDF Classifier malicious score 0.9964

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/how-to-get-a-cape-in-minecraft-for-free-game-hack In PDF document text
- https://www.tena-g.hr/files/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
- https://tena-g.hr/files/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
- https://www.tena-g.hr/files/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
- https://tena-g.hr/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://tena-g.hr/files/play-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
- https://tena-g.hr/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
- https://tena-g.hr/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
- https://www.tena-g.hr/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.tena-g.hr/files/free-tiktok-followers-instantly_GM835599320.pdfIn PDF document text
- https://tena-g.hr/files/hacks-to-get-free-robux_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
`stream_002_off0000322e.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x322E	23052 bytes
SHA-256: `821d746b49f1432ecd513253c9fcff9e82944275e1ca71c0de5c3da8ec71de65`
`font_01_sfnt_off000065f4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x65F4	18052 bytes
SHA-256: `651613c0b0933ea46dfe34ab8437030315119b6d54c219aba7cf9326f75e4fa1`

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