PDF malware analysis — malicious · fb0289e9b481a6b5

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 10:37:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11

MD5: 86cbb928b47bf0c18a97762903d619df SHA-1: a20aa502988507bb6ba05a8956f64af4ea66dc47 SHA-256: fb0289e9b481a6b53be0a9c6634a35dae261ce3beffb2704c736f7a2117f9e23

160 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 multiple links, including a critical one to a known malicious redirector at http://netcdn.tw/app/406889139/free-coins-coin-master-link-2021-game-hack. The document body and embedded URLs suggest a social engineering tactic to drive traffic to potentially malicious sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 4

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.
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-coins-coin-master-link-2021-game-hack In PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/offer-for-pubg-uc_GM1330123889.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/roblox-hack-codes_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/robux-hack-tools_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/codes-to-hack-roblox_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-daily-spin-link_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/free-admin-hack-roblox-kazok_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/free-25-spins-coin-master-links_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/free-prizes-roblox-2021-november_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/minecraft-reach-hack_GM479516143.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/free-clothes-of-roblox_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/roblox-hack-deutsch-auf-pc_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/free-robux-reddit_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/free-reall-robux-hack_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/100-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/if-everything-was-free-roblox_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/get-robux-com_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/blackberry-hacks-roblox_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/how-to-hack-a-roblox-account-2021_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_off00003325.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3325	22796 bytes
SHA-256: `e8fe9d31a4229f947736f8bf4e8ba9de7921c350418ba600c7d57e156df30367`
`font_01_sfnt_off0000664b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x664B	18568 bytes
SHA-256: `78f0d12b68881e573adc62c36b9fc3fc39d874b33803a7d3bcdcc28c0a8567d3`

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