PDF malware analysis — malicious · 2a4fd874c6ded58c

MALICIOUS

PDF

43.7 KB Created: 2021-05-16 13:02:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 35aaa3f76d75451e1531d414aa400431 SHA-1: acda3cdb962318d9fa9d142c12e863d3e7c015a9 SHA-256: 2a4fd874c6ded58c11ccebb31a88dd51fecb68e04554a15370be9c0c9825d0a3

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to external websites, including one identified as a malicious redirector. The document body and heuristic firings indicate a lure for 'game hacks' or 'generators', suggesting an attempt to trick users into downloading or visiting malicious sites. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

Nyx PDF Classifier malicious score 0.9969

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 https://netcdn.xyz/app/431946152/how-to-hack-roblox-2021-game-hack In PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/is-minecraft-java-free_GM479516143.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/coin-master-gold-cards-free-link_GM406889139.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/minecraft-free-download-apk-softonic_GM479516143.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/hack-coin-master-ios-download_GM406889139.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/coin-master-free_GM406889139.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/free-robux-promo-codes_GM431946152.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/coin-master-hack-cheat-generator-d_GM406889139.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/legit-coin-master-hack-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/free-minecraft-accounts-2021_GM479516143.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/roblox-printables-free_GM431946152.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
- https://mylittlebigthing.com/assets/images/posts/uploads/files/coin-master-hack-pc-download_GM406889139.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_off00004aa7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4AA7	26548 bytes
SHA-256: `5d922c307e9231a41ccd17fb074ab99a0246b035afc71bacd783269d8f394fc9`
`font_01_sfnt_off000086dc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x86DC	18748 bytes
SHA-256: `82830e686af2a9787477f8716b243dfdc4e826425849e85a18f820c98dc205f5`

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