PDF malware analysis — malicious · 109752200268a2f4

MALICIOUS

PDF

35.6 KB Created: 2021-07-09 02:18:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21

MD5: 4db188077fb331a64211ce606778e69c SHA-1: ba9b215fc7a6c273d4570704aef1bf8852825d18 SHA-256: 109752200268a2f4a6d99342687c5286252deb70afed96bd0fbd7db4ceb5e9ac

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links to external sites, including a known malicious redirector at http://netcdn.tw/app/431946152/roblox-pics-game-hack. These links are presented as lures for free game items, such as Robux, and are part of a link farm designed to attract users. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the overall pattern suggests a phishing or scam attempt to drive traffic to malicious infrastructure.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/roblox-pics-game-hack In PDF document text
- https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
- https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
- https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
- https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/how-to-get-games-free-roblox_GM431946152.pdfIn PDF document text
- https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/free-robux-pastebin-30_GM431946152.pdfIn PDF document text
- https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/pokemon-go-free-latest-version_GM1094591345.pdfIn PDF document text
- https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/coin-master-free-spins-generator_GM406889139.pdfIn PDF document text
- https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/robux-apk_GM431946152.pdfIn PDF document text
- https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/dragon-ball-final-stand-roblox-hacks_GM431946152.pdfIn PDF document text
- https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/roblox-skin-free_GM431946152.pdfIn PDF document text
- https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/free-robux-win-2021_GM431946152.pdfIn PDF document text
- https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/free-superhero-skin-roblox_GM431946152.pdfIn PDF document text
- https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/hack-roblox-ban-users_GM431946152.pdfIn PDF document text
- https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/good-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
- https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/how-to-change-your-name-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
- https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
- https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/how-to-dop-the-flying-hack-in-roblox_GM431946152.pdfIn PDF document text
- https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/free-robux-promo-codes_GM431946152.pdfIn PDF document text
- https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/hack-de-sexo-roblox-tutorial_GM431946152.pdfIn PDF document text
- https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/how-to-get-minecraft-pocket-edition-for-free_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_off000033e4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x33E4	22880 bytes
SHA-256: `6c9342a4bd2c18c196e0e225ba85b5cbce226799fed74c5eb585ea0a3c2efc33`
`font_01_sfnt_off00006725.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6725	18760 bytes
SHA-256: `4b095f4b8887294ffd8970da978281d8a745c5c5e0b2658ea64b9d3d0d40b151`

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