PDF malware analysis — malicious · 49958b12152b24e7

MALICIOUS

PDF

46.3 KB Created: 2021-06-03 09:29:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23

MD5: a0e251a903c38268cf4b73a3e40077a0 SHA-1: 548bc95f5cc437adb87782d0c4aa7a10a32aaa8b SHA-256: 49958b12152b24e7b2898c951274153864fc3d14761f6e6951879f0f71c7de1e

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites that are associated with game hacks and free currency generators, indicating a lure for users to visit potentially malicious sites. The heuristic firings confirm the presence of malicious redirector links and a general ML classification of maliciousness. Although no scripts were explicitly extracted, the embedded URLs and the nature of the lures suggest an attempt to redirect users to download further payloads or engage in phishing-like activities.

Machine Learning

Nyx PDF Classifier malicious score 0.9748

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.online/app/406889139/coin-master-blogspot-game-hack In PDF document text
- https://www.dc-itsolutions.com/userfiles/files/roblox-verification_GM431946152.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/online-coin-master-hack-here_GM406889139.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/best-free-hacked-client_GM479516143.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/free-robux-card-codes_GM431946152.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/free-roblox-intros_GM431946152.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/coin-master-free-spins-save_GM406889139.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/hack-coin-master-apk-358_GM406889139.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/roblox-fun-com-robux_GM431946152.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/freegames911com-coinmastertipsandcheats2021freecoinsandspins_GM406889139.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/robux-hack-tools_GM431946152.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/roblox-hack-unlimited-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
`stream_004_off00004e9b.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4E9B	24988 bytes
SHA-256: `e1e4a6caba20983718d5ee4d882fd718a3b53bd4e7ae4a588e03b660580ae50a`
`font_01_sfnt_off00008820.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8820	2880 bytes
SHA-256: `10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132`
`font_02_sfnt_off0000920b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x920B	18300 bytes
SHA-256: `856755575c1a7459373c524fcaf021c967fba3d5c4d4b4c6d782a1862ea9e167`

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