PDF malware analysis — malicious · a07f5fe07d939d17

MALICIOUS

PDF

36.1 KB Created: 2021-07-05 10:46:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: ff6a45fdcbcece0c11d2aa5406aa703d SHA-1: dbfaa5dbd522d3f305a89a7c2c6d2c8144f80faf SHA-256: a07f5fe07d939d17d87043063d2e96bcad1037647fb062aed1fc150aabab8549

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on what appear to be 'free generator' or 'game hack' sites. The primary link, http://netcdn.tw/app/406889139/free-gifts-coin-master-game-hack, is identified as a malicious redirector. The document body and heuristics indicate a focus on popular games like Coin Master and Roblox, suggesting a phishing or scam attempt to drive traffic to malicious sites.

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/free-gifts-coin-master-game-hack In PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/how-do-you-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/roblox-hack-com_GM431946152.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/roblox-synapse-exploit-free-cracked_GM431946152.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/how-to-hack-coin-master-using-es-file_GM406889139.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/how-to-get-coin-master-free-spins-in-email_GM406889139.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/coin-master-free-spin-link-new_GM406889139.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/coin-master-free-spins-link-cheat_GM406889139.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/how-to-hack-roblox-robux-with-cheat-engine-62_GM431946152.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/como-tener-rpa-de-robux-hack_GM431946152.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/coin-master-daily-free-spins-link-today-blog_GM406889139.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/coin-master-cards_GM406889139.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/hacking-roblox-trhough-coockies_GM431946152.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/how-to-get-free-bloxburg-in-roblox_GM431946152.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/free-robux-pin-codes_GM431946152.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/how-to-hack-roblox-to-get-free-robux_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
`stream_002_off000037dc.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x37DC	22988 bytes
SHA-256: `ae38cbf35871a073b196ed07f19429ca4b07a7bdeb96855881111315651d807b`
`font_01_sfnt_off00006b55.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6B55	17996 bytes
SHA-256: `faca2fcb6c4cac826a99167761e8bd159d1797525f90f057d0380de2815de637`

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