PDF malware analysis — malicious · 42310bd26c755140

MALICIOUS

PDF

47.4 KB Created: 2021-06-03 08:21:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21

MD5: ec202883370694061e7fbc5a89a70319 SHA-1: 5d7ef7c2c3145f0d0a4c2b78c1451668ba292ac0 SHA-256: 42310bd26c7551407667b77e1b55f494fbab1cf3e723168cbf4e25eb91714dfd

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users into clicking on them by promising free game currency or hacks. The primary link redirects to a known malicious infrastructure, and the document body itself contains obfuscated text and URLs pointing to other potentially malicious PDF files. The presence of multiple redirector links and the ML classifier's high confidence score indicate a malicious intent to direct users to harmful websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9769

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 https://netcdn.online/app/431946152/oprewards-free-robux-game-hack In PDF document text
- http://www.goaheadmigration.com/uploaded_files/userfiles/files/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
- http://www.goaheadmigration.com/uploaded_files/userfiles/files/free-spins-coin-master-legit_GM406889139.pdfIn PDF document text
- http://www.goaheadmigration.com/uploaded_files/userfiles/files/coin-master-free-spins-link-today-ios_GM406889139.pdfIn PDF document text
- http://www.goaheadmigration.com/uploaded_files/userfiles/files/free-coin-master-game_GM406889139.pdfIn PDF document text
- http://www.goaheadmigration.com/uploaded_files/userfiles/files/how-to-hack-coin-master-android_GM406889139.pdfIn PDF document text
- http://www.goaheadmigration.com/uploaded_files/userfiles/files/buy-robux-free_GM431946152.pdfIn PDF document text
- http://www.goaheadmigration.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
- http://www.goaheadmigration.com/uploaded_files/userfiles/files/robux-hack-2021_GM431946152.pdfIn PDF document text
- http://www.goaheadmigration.com/uploaded_files/userfiles/files/how-to-hack-roblox_GM431946152.pdfIn PDF document text
- http://www.goaheadmigration.com/uploaded_files/userfiles/files/robux-free-robux_GM431946152.pdfIn PDF document text
- http://www.goaheadmigration.com/uploaded_files/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
- http://www.goaheadmigration.com/uploaded_files/userfiles/files/free-robux-ad_GM431946152.pdfIn PDF document text
- http://www.goaheadmigration.com/uploaded_files/userfiles/files/coin-master-free-coins-facebook_GM406889139.pdfIn PDF document text
- http://www.goaheadmigration.com/uploaded_files/userfiles/files/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
- http://www.goaheadmigration.com/uploaded_files/userfiles/files/coin-master-free-spins-fb_GM406889139.pdfIn PDF document text
- http://www.goaheadmigration.com/uploaded_files/userfiles/files/master-free-spins-and-coins_GM406889139.pdfIn PDF document text
- http://www.goaheadmigration.com/uploaded_files/userfiles/files/coin-master-free-stuff-links_GM406889139.pdfIn PDF document text
- http://www.goaheadmigration.com/uploaded_files/userfiles/files/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
- http://www.goaheadmigration.com/uploaded_files/userfiles/files/is-roblox-free-on-ps4_GM431946152.pdfIn PDF document text
- http://www.goaheadmigration.com/uploaded_files/userfiles/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off00005209.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5209	23964 bytes
SHA-256: `e1d066e35d1cc3933269b159a752531db5bcaf3895929b160a8bc77ee1391d39`
`font_01_sfnt_off00008859.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8859	5596 bytes
SHA-256: `9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5`
`font_02_sfnt_off00009501.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9501	18756 bytes
SHA-256: `ea6a04d6c65882c9dd78ee7ca96c70e45062fdc6b69d68e2fcdc099d3abb6428`

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