PDF malware analysis — malicious · 05dbf7fd4028cbb6

MALICIOUS

PDF

46.6 KB Created: 2021-05-11 17:08:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02

MD5: b53a241c142333eadc83a4f2139117f1 SHA-1: 8dc006c5101c528eadaf83177bb14ffe0ee9faef SHA-256: 05dbf7fd4028cbb650b5e55ffc8ab6aeae8086ac1472f83556f4e062017fbb2d

200 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links designed to lure users into clicking on a malicious redirector disguised as a 'free generator / game hack' for Robux, impersonating Facebook. The primary malicious URL identified is https://netcdn.xyz/app/431946152/how-to-win-free-robux-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit user interest in free in-game currency to redirect them to potentially harmful content or phishing sites.

Machine Learning

Nyx PDF Classifier malicious score 0.8948

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.
Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH

Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/how-to-win-free-robux-game-hack.
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-win-free-robux-game-hack In PDF document text
- http://opac.b2p2vrp.litbang.kemkes.go.id/repository/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
- http://opac.b2p2vrp.litbang.kemkes.go.id/repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
- http://opac.b2p2vrp.litbang.kemkes.go.id/repository/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
- http://opac.b2p2vrp.litbang.kemkes.go.id/repository/is-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
- http://opac.b2p2vrp.litbang.kemkes.go.id/repository/coin-master-fun-free-spins_GM406889139.pdfIn PDF document text
- http://opac.b2p2vrp.litbang.kemkes.go.id/repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
- http://opac.b2p2vrp.litbang.kemkes.go.id/repository/robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
- http://opac.b2p2vrp.litbang.kemkes.go.id/repository/robux-adder_GM431946152.pdfIn PDF document text
- http://opac.b2p2vrp.litbang.kemkes.go.id/repository/free-minecraft-coins_GM479516143.pdfIn PDF document text
- http://opac.b2p2vrp.litbang.kemkes.go.id/repository/how-to-get-more-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
- http://opac.b2p2vrp.litbang.kemkes.go.id/repository/free-links-for-free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
- http://opac.b2p2vrp.litbang.kemkes.go.id/repository/facebook-coin-master_GM406889139.pdfIn PDF document text
- http://opac.b2p2vrp.litbang.kemkes.go.id/repository/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
- http://opac.b2p2vrp.litbang.kemkes.go.id/repository/coin-master-hack-cydia_GM406889139.pdfIn PDF document text
- http://opac.b2p2vrp.litbang.kemkes.go.id/repository/robux-free-co_GM431946152.pdfIn PDF document text
- http://opac.b2p2vrp.litbang.kemkes.go.id/repository/coin-master-hack-september-2021_GM406889139.pdfIn PDF document text
- http://opac.b2p2vrp.litbang.kemkes.go.id/repository/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
- http://opac.b2p2vrp.litbang.kemkes.go.id/repository/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
- http://opac.b2p2vrp.litbang.kemkes.go.id/repository/no-scam-free-robux_GM431946152.pdfIn PDF document text
- http://opac.b2p2vrp.litbang.kemkes.go.id/repository/free-robux-hack-2021_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_003_off00004ad2.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4AD2	27416 bytes
SHA-256: `4259912eeaa640f4e19d108e4cd035c524c8db70dfeca982fbd81b239c6e181e`
`font_01_sfnt_off00008913.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8913	2936 bytes
SHA-256: `c06b3113924030305e77bcf9fb59d6d068fb879dac89d836e8bedfcb0506a839`
`font_02_sfnt_off00009335.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9335	18496 bytes
SHA-256: `e7fadbffdbea7672d80b62dbce00c4cb5a3018b55a4b8226d615899545ab846e`

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