PDF malware analysis — malicious · bfc8b739d93b1ec6

MALICIOUS

PDF

37.6 KB Created: 2021-07-02 08:58:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23

MD5: e87ccebdbeb8f3d7d7573dc14645565f SHA-1: 75e6a2bfaf3794d3d48fabf110d020e0aaf4ce6c SHA-256: bfc8b739d93b1ec60e480fad6e13388257a865efdc20b358b0a8c30d61437ce5

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including a known malicious redirector at http://netcdn.co/app/431946152/free-robux-generator-2021-game-hack, and a large number of links to PDF files hosted on spapanggilanjogja.com. These links are presented as 'free Robux' or 'game hack' generators, indicating a lure to potentially malicious content or phishing sites. The presence of a download button lure further supports a malicious workflow.

Machine Learning

Nyx PDF Classifier malicious score 0.9981

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/free-robux-generator-2021-game-hack In PDF document text
- https://www.spapanggilanjogja.com/ckfinder/userfiles/files/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
- https://www.spapanggilanjogja.com/ckfinder/userfiles/files/roblox-survey-for-robux_GM431946152.pdfIn PDF document text
- https://www.spapanggilanjogja.com/ckfinder/userfiles/files/coin-master-hack-version-download_GM406889139.pdfIn PDF document text
- https://www.spapanggilanjogja.com/ckfinder/userfiles/files/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
- https://www.spapanggilanjogja.com/ckfinder/userfiles/files/coin-master-free-daily-rewards_GM406889139.pdfIn PDF document text
- https://www.spapanggilanjogja.com/ckfinder/userfiles/files/best-roblox-hacks_GM431946152.pdfIn PDF document text
- https://www.spapanggilanjogja.com/ckfinder/userfiles/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
- https://www.spapanggilanjogja.com/ckfinder/userfiles/files/coin-master-free-spins-link-app-download_GM406889139.pdfIn PDF document text
- https://www.spapanggilanjogja.com/ckfinder/userfiles/files/static-moonactive_GM406889139.pdfIn PDF document text
- https://www.spapanggilanjogja.com/ckfinder/userfiles/files/coin-master-free-stars_GM406889139.pdfIn PDF document text
- https://www.spapanggilanjogja.com/ckfinder/userfiles/files/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
- https://www.spapanggilanjogja.com/ckfinder/userfiles/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
- https://www.spapanggilanjogja.com/ckfinder/userfiles/files/minecraft-pocket-edition-apk-free-download_GM479516143.pdfIn PDF document text
- https://www.spapanggilanjogja.com/ckfinder/userfiles/files/coinmasterfree_GM406889139.pdfIn PDF document text
- https://www.spapanggilanjogja.com/ckfinder/userfiles/files/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.spapanggilanjogja.com/ckfinder/userfiles/files/get-robux-com_GM431946152.pdfIn PDF document text
- https://www.spapanggilanjogja.com/ckfinder/userfiles/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.spapanggilanjogja.com/ckfinder/userfiles/files/legitimate-coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
- https://www.spapanggilanjogja.com/ckfinder/userfiles/files/coin-master-hack-apk-android-1_GM406889139.pdfIn PDF document text
- https://www.spapanggilanjogja.com/ckfinder/userfiles/files/coin-master-game-hunters-club_GM406889139.pdfIn PDF document text
- https://www.roblox.com/.IIn 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_off00003c1b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3C1B	22296 bytes
SHA-256: `153e4d8bf247d0c93c83d7b476675ee598d7b8fa58180f8945c10aecf271b348`
`font_01_sfnt_off00006d92.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6D92	19224 bytes
SHA-256: `e428ca4c21c8feda58ff9d2cee9e63eb7b19a929803cf1f6eebeef0755d1c14a`

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