PDF malware analysis — malicious · b2b1cffa69165a14

MALICIOUS

PDF

35.6 KB Created: 2021-06-19 02:27:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13

MD5: 9892a7492135e436e6482551a5f4792b SHA-1: 0993722ae465e5c6ddb6d07a5bec043ff054ac47 SHA-256: b2b1cffa69165a14669aaf4f6ab66032edb18b19f695dd5d2e7c3250f8b45a0f

180 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks and generators. The primary lure URL, http://netcdn.co/app/431946152/wild-savannah-roblox-how-to-change-colours-hack-game-hack, is identified as a malicious redirector. The document's content and structure strongly suggest a phishing or scam attempt designed to lead users to potentially harmful 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.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
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/wild-savannah-roblox-how-to-change-colours-hack-game-hack In PDF document text
- https://gaushalango.com/uploaded_files/userfiles/files/free-group-payouts-robux_GM431946152.pdfIn PDF document text
- https://gaushalango.com/uploaded_files/userfiles/files/download-minecraft-bedrock_GM479516143.pdfIn PDF document text
- https://gaushalango.com/uploaded_files/userfiles/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
- https://gaushalango.com/uploaded_files/userfiles/files/hack-ninja-assassin-roblox_GM431946152.pdfIn PDF document text
- https://gaushalango.com/uploaded_files/userfiles/files/hack-my-spins-coin-master_GM406889139.pdfIn PDF document text
- https://gaushalango.com/uploaded_files/userfiles/files/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
- https://gaushalango.com/uploaded_files/userfiles/files/minecraft-mod-menu-apk_GM479516143.pdfIn PDF document text
- https://gaushalango.com/uploaded_files/userfiles/files/free-tiktok-coins_GM835599320.pdfIn PDF document text
- https://gaushalango.com/uploaded_files/userfiles/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
- https://gaushalango.com/uploaded_files/userfiles/files/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
- https://gaushalango.com/uploaded_files/userfiles/files/how-to-change-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
- https://gaushalango.com/uploaded_files/userfiles/files/pokemon-go-free-bag-upgrade_GM1094591345.pdfIn PDF document text
- https://gaushalango.com/uploaded_files/userfiles/files/free-roblox-promo-codes-2021-april_GM431946152.pdfIn PDF document text
- https://gaushalango.com/uploaded_files/userfiles/files/coin-mster-free_GM406889139.pdfIn PDF document text
- https://gaushalango.com/uploaded_files/userfiles/files/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
- https://gaushalango.com/uploaded_files/userfiles/files/free-minecraft-packs_GM479516143.pdfIn PDF document text
- https://gaushalango.com/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
- https://gaushalango.com/uploaded_files/userfiles/files/how-to-coin-master-spin-hack_GM406889139.pdfIn PDF document text
- https://gaushalango.com/uploaded_files/userfiles/files/coin-master-free-spin-27_GM406889139.pdfIn PDF document text
- https://gaushalango.com/uploaded_files/userfiles/files/coin-master-free-coins_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_off000032d5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x32D5	22280 bytes
SHA-256: `b68f9b5f55d4d2f80b33e9e9dd301122485b35f4b31ad93c71d2a1f582182ff5`
`font_01_sfnt_off0000644d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x644D	19732 bytes
SHA-256: `a83dd1f18e5a8448917bb1efda02bb26215cc676e6f786d57cb1b1d00bdfd976`

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