PDF malware analysis — malicious · 52536a9bf27a33c3

MALICIOUS

PDF

43.2 KB Created: 2021-06-04 02:52:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27

MD5: 687069accf28b3a017654a7e3e867f01 SHA-1: ba3cb77065f79abfeda81b0adc56cccf5785267b SHA-256: 52536a9bf27a33c3301a6d88054947be12ce941a5992327dc2f29590a8ceffed

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links to external resources, including a primary link to a 'free generator / game hack' and a large number of other PDF links, suggesting a link farm designed for SEO manipulation. The ML classifier also flagged this PDF as malicious. The primary lure appears to be related to game cheats, which is a common pretext for distributing malware or leading users to phishing sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9865

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/406889139/free-coin-master-cards-game-hack In PDF document text
- http://perpustakaan-pelita.sdnpercobaan2yogyakarta.com/repository/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
- http://perpustakaan-pelita.sdnpercobaan2yogyakarta.com/repository/wurst-client_GM479516143.pdfIn PDF document text
- http://perpustakaan-pelita.sdnpercobaan2yogyakarta.com/repository/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
- http://perpustakaan-pelita.sdnpercobaan2yogyakarta.com/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
- http://perpustakaan-pelita.sdnpercobaan2yogyakarta.com/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
- http://perpustakaan-pelita.sdnpercobaan2yogyakarta.com/repository/minecraft-apk-download-free-11-055_GM479516143.pdfIn PDF document text
- http://perpustakaan-pelita.sdnpercobaan2yogyakarta.com/repository/roblox40com-robux_GM431946152.pdfIn PDF document text
- http://perpustakaan-pelita.sdnpercobaan2yogyakarta.com/repository/how-to-get-free-robux_GM431946152.pdfIn PDF document text
- http://perpustakaan-pelita.sdnpercobaan2yogyakarta.com/repository/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
- http://perpustakaan-pelita.sdnpercobaan2yogyakarta.com/repository/free-robux-no-password_GM431946152.pdfIn PDF document text
- http://perpustakaan-pelita.sdnpercobaan2yogyakarta.com/repository/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
- http://perpustakaan-pelita.sdnpercobaan2yogyakarta.com/repository/pokemon-go-free-and-switch-connect_GM1094591345.pdfIn PDF document text
- http://perpustakaan-pelita.sdnpercobaan2yogyakarta.com/repository/free-roblox-acc_GM431946152.pdfIn PDF document text
- http://perpustakaan-pelita.sdnpercobaan2yogyakarta.com/repository/free-robux-hack-no-human-verification-2021_GM431946152.pdfIn PDF document text
- http://perpustakaan-pelita.sdnpercobaan2yogyakarta.com/repository/get-robux-com_GM431946152.pdfIn PDF document text
- http://perpustakaan-pelita.sdnpercobaan2yogyakarta.com/repository/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
- http://perpustakaan-pelita.sdnpercobaan2yogyakarta.com/repository/minecraft-the-complete-handbook-collection_GM479516143.pdfIn PDF document text
- http://perpustakaan-pelita.sdnpercobaan2yogyakarta.com/repository/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
- http://perpustakaan-pelita.sdnpercobaan2yogyakarta.com/repository/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
- http://perpustakaan-pelita.sdnpercobaan2yogyakarta.com/repository/free-minecraft-premium-account_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
`stream_004_off0000503a.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x503A	24040 bytes
SHA-256: `fd7f92da6b21e31b97c4648c2399921b704dc3ba15b69b3502aa71fcb9dd8d96`
`font_01_sfnt_off0000873d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x873D	17884 bytes
SHA-256: `34dd8c80f69d0f68a5b5993274c8f1bdeef3254478921523cc39dd8566b84a5f`

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