PDF malware analysis — malicious · 72c2b348cdc1f2b7

MALICIOUS

PDF

35.3 KB Created: 2021-07-01 07:07:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11

MD5: 026e59211b3d03efb1ecf6724399a0eb SHA-1: d8a8ed4c9582d9b6c2b0afc32dd8c8cc79026f40 SHA-256: 72c2b348cdc1f2b7aa57a6e4aa1be8cd056da220409eed1da4ca6fa8c404cfce

240 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous links designed to lure users into clicking on game-related cheats and hacks, with a primary redirector URL identified as malicious. The document body and heuristics indicate a scam or phishing attempt, likely to lead users to sites that may host further malware or attempt credential harvesting. No scripts were extracted from this sample.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 6

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.
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) 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/how-i-get-free-robux-rbxrewards-game-hack In PDF document text
- https://www.advancissurgical.com/uploads/files/files/roblox-guess-the-emoji-cheat_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/hacks-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/google-how-do-you-get-robux_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/how-to-get-free-stuff-in-roblox-working-2021_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/yyoutube-robux-hacks_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/cheat-codes-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/how-to-hack-robux-in-roblox-2021_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/rbx-earn_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/cheats-glitches-for-roblox_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/coin-master-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/download-roblox-for-free-unlockable_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/free-spins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
- https://www.advancissurgical.com/uploads/files/files/how-to-get-java-minecraft-free_GM479516143.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_off00003164.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3164	22692 bytes
SHA-256: `4f568c577a0e8b6de326de955abd618d9d327194035ee07f0ed69ff89dbfddb2`
`font_01_sfnt_off00006459.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6459	19156 bytes
SHA-256: `876a267997f4145aa6dcf3de94a6156a4fcb0b008101ffcd5a264ff10abce63e`

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