PDF malware analysis — malicious · b03821ff1a097496

MALICIOUS

PDF

49.4 KB Created: 2021-06-03 07:41:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12

MD5: 83a91a9725179aca2e2ec334594ad056 SHA-1: 72b1e60675e6071b414e0d85ac387b210a0244cc SHA-256: b03821ff1a097496a4ed188af91f018fad55e2806ac82d0f6e5518cdbabd19a3

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure of free game hacks and generators to entice users into clicking malicious links. The primary link directs to a known malicious redirector, which likely serves as a gateway to further malicious content or malware. The document's structure and numerous embedded links suggest a coordinated effort to drive traffic to potentially harmful sites, aligning with common phishing and malware distribution tactics.

Machine Learning

Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.online/app/431946152/temple-free-roblox-game-hack In PDF document text
- https://emindonesia.com/assets/CKImages/files/hack-roblox-players_GM431946152.pdfIn PDF document text
- https://emindonesia.com/assets/CKImages/files/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
- https://emindonesia.com/assets/CKImages/files/coin-master-mod-version-free-download-2021_GM406889139.pdfIn PDF document text
- https://emindonesia.com/assets/CKImages/files/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
- https://emindonesia.com/assets/CKImages/files/free-links-for-coin-master_GM406889139.pdfIn PDF document text
- https://emindonesia.com/assets/CKImages/files/minecraft-online-free-download_GM479516143.pdfIn PDF document text
- https://emindonesia.com/assets/CKImages/files/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
- https://emindonesia.com/assets/CKImages/files/win-free-robux_GM431946152.pdfIn PDF document text
- https://emindonesia.com/assets/CKImages/files/windows-10-minecraft-free-with-java_GM479516143.pdfIn PDF document text
- https://emindonesia.com/assets/CKImages/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
- https://emindonesia.com/assets/CKImages/files/coin-master-hack-without-downloading-apps_GM406889139.pdfIn PDF document text
- https://emindonesia.com/assets/CKImages/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://emindonesia.com/assets/CKImages/files/optifine-minecraft-pe_GM479516143.pdfIn PDF document text
- https://emindonesia.com/assets/CKImages/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
- https://emindonesia.com/assets/CKImages/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
- https://emindonesia.com/assets/CKImages/files/robux-robux_GM431946152.pdfIn PDF document text
- https://emindonesia.com/assets/CKImages/files/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://emindonesia.com/assets/CKImages/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
- https://emindonesia.com/assets/CKImages/files/fbchampion-com_GM406889139.pdfIn PDF document text
- https://emindonesia.com/assets/CKImages/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005450.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5450	25896 bytes
SHA-256: `b2c6bb3797b2eee3c8e2da21b758bacb5bf52586a8f33ece0f5bb698fd31a76e`
`font_01_sfnt_off00008e2f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8E2F	6636 bytes
SHA-256: `62075f0fe13502d46afb6e55e83d440c29ef4988399537df1f86e7653ce3b744`
`font_02_sfnt_off00009e3c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9E3C	18384 bytes
SHA-256: `27b3b5e8fc27f2ac031e02d0262d392589d7b82401e58720a93d34be37a5c993`

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