PDF malware analysis — malicious · 11d6b6ef5ca39213

MALICIOUS

PDF

34.8 KB Created: 2021-06-22 23:33:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23

MD5: 0650d2ac9c8c46493637e57f449a5004 SHA-1: 311b139098f1befc09d526940514f27e14787bb5 SHA-256: 11d6b6ef5ca3921368f51c8f73b792924877003869846d3027bd5360e6c6f086

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game currency and hacks to entice users. It contains numerous links to redirectors and SEO link farms, including the primary malicious redirector at http://netcdn.co/app/431946152/how-to-hack-roblox-robux-2021-no-survey-game-hack. The document's structure and embedded links strongly suggest a phishing or scam campaign designed to lead users to potentially malicious websites.

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.co/app/431946152/how-to-hack-roblox-robux-2021-no-survey-game-hack In PDF document text
- http://www.technibuild-group.com/uploaded_files/userfiles/files/how-do-u-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
- http://www.technibuild-group.com/uploaded_files/userfiles/files/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
- http://www.technibuild-group.com/uploaded_files/userfiles/files/coin-master-hack-spins-ios_GM406889139.pdfIn PDF document text
- http://www.technibuild-group.com/uploaded_files/userfiles/files/free-roblox-cards-pin-number_GM431946152.pdfIn PDF document text
- http://www.technibuild-group.com/uploaded_files/userfiles/files/free-minecraft-gift-card_GM479516143.pdfIn PDF document text
- http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-get-more-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
- http://www.technibuild-group.com/uploaded_files/userfiles/files/coin-master-hacked-apk-download-for-android_GM406889139.pdfIn PDF document text
- http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-legally-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
- http://www.technibuild-group.com/uploaded_files/userfiles/files/free-spins-for-coin-master-that-work_GM406889139.pdfIn PDF document text
- http://www.technibuild-group.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-for-iphone_GM406889139.pdfIn PDF document text
- http://www.technibuild-group.com/uploaded_files/userfiles/files/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
- http://www.technibuild-group.com/uploaded_files/userfiles/files/coin-master-twitter_GM406889139.pdfIn PDF document text
- http://www.technibuild-group.com/uploaded_files/userfiles/files/bloxmate-free-robux_GM431946152.pdfIn PDF document text
- http://www.technibuild-group.com/uploaded_files/userfiles/files/boing-arroe-free-roblox_GM431946152.pdfIn PDF document text
- http://www.technibuild-group.com/uploaded_files/userfiles/files/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
- http://www.technibuild-group.com/uploaded_files/userfiles/files/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
- http://www.technibuild-group.com/uploaded_files/userfiles/files/minecraft-coins-free_GM479516143.pdfIn PDF document text
- http://www.technibuild-group.com/uploaded_files/userfiles/files/coin-master-card-hack-apk_GM406889139.pdfIn PDF document text
- http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
- http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-get-free-faces-on-roblox_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_off000030ce.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x30CE	21844 bytes
SHA-256: `8bda645bcfc0c6bea9b026fec49dfb63055904e00908fb3e081734b8d09c5d0c`
`font_01_sfnt_off000060e4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x60E4	19656 bytes
SHA-256: `3b2c3135a1845c23e1fd2fba0a11a475cbf1fe5e3f0e62c41b21fe4ead39c8e4`

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