PDF malware analysis — malicious · a3fd04d37be70a2f

MALICIOUS

PDF

36.3 KB Created: 2021-07-03 23:41:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: c55af7de3601e717b47219739f142283 SHA-1: 42e529b14cd94b080d91d05c5ca52f6e8a048114 SHA-256: a3fd04d37be70a2fbff645577f0fb321335ca45401645aa934055c2c9c20f556

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, including a primary link to a known malicious redirector that itself hosts a large number of scam-related PDF files. The document body and heuristics indicate a lure for game hacks and free currency, designed to lead users to potentially malicious content. No scripts were extracted, but the extensive link farm and redirector usage suggest a phishing or scam campaign.

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/406889139/coin-master-free-spins-and-coins-link-haktuts-game-hack In PDF document text
- https://www.delhihomeoboard.in/uploaded_files/userfiles/files/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
- https://www.delhihomeoboard.in/uploaded_files/userfiles/files/god-mode-hacks-for-roblox-arsenal-of-free_GM431946152.pdfIn PDF document text
- https://www.delhihomeoboard.in/uploaded_files/userfiles/files/free-robux-2021-september-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.delhihomeoboard.in/uploaded_files/userfiles/files/roblox-robux-hack-download-ios_GM431946152.pdfIn PDF document text
- https://www.delhihomeoboard.in/uploaded_files/userfiles/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
- https://www.delhihomeoboard.in/uploaded_files/userfiles/files/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
- https://www.delhihomeoboard.in/uploaded_files/userfiles/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
- https://www.delhihomeoboard.in/uploaded_files/userfiles/files/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
- https://www.delhihomeoboard.in/uploaded_files/userfiles/files/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
- https://www.delhihomeoboard.in/uploaded_files/userfiles/files/how-to-get-free-robux-without-human-verification-on-ipad_GM431946152.pdfIn PDF document text
- https://www.delhihomeoboard.in/uploaded_files/userfiles/files/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
- https://www.delhihomeoboard.in/uploaded_files/userfiles/files/tiktok-free-view-iphone-survey_GM835599320.pdfIn PDF document text
- https://www.delhihomeoboard.in/uploaded_files/userfiles/files/smart-lodhi-coin-master-hack_GM406889139.pdfIn PDF document text
- https://www.delhihomeoboard.in/uploaded_files/userfiles/files/coin-master-unlimited-spin-and-coin-hack_GM406889139.pdfIn PDF document text
- https://www.delhihomeoboard.in/uploaded_files/userfiles/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.delhihomeoboard.in/uploaded_files/userfiles/files/village-4-coin-master_GM406889139.pdfIn PDF document text
- https://www.delhihomeoboard.in/uploaded_files/userfiles/files/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
- https://www.delhihomeoboard.in/uploaded_files/userfiles/files/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
- https://www.delhihomeoboard.in/uploaded_files/userfiles/files/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
- https://www.delhihomeoboard.in/uploaded_files/userfiles/files/coin-master-free-spin-facebook-link_GM406889139.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_off00003506.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3506	23468 bytes
SHA-256: `23f651ba3ce576b0044fb8f78f32e8c092e48d5861a3b9c2ff07772c33cbe358`
`font_01_sfnt_off00006a13.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6A13	18656 bytes
SHA-256: `3e017b30533e4f5594d0ce20bcdebe9dbaf30d7e5f6e53e964d5ed5cfbcf7f01`

Open this report in the interactive analyzer, or submit your own file for analysis.