PDF malware analysis — malicious · dfdbf682697cbfb7

MALICIOUS

PDF

41.7 KB Created: 2021-05-10 18:51:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16

MD5: 15beb4ad23fa7efb887fb137d3519030 SHA-1: 773a2a905d5b5e4e50322862688b0b14bd5a5f7d SHA-256: dfdbf682697cbfb75bfa8145478752f70bd20f7abd7859243213a5baf229b9e5

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users into clicking on what appear to be game-related hacks or generators. The primary link redirects to known malicious infrastructure, and the document body itself contains a large number of links to other PDFs hosted on a potentially related domain, suggesting a link farm or redirection scheme. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or scam attempt, likely using a spearphishing attachment vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/spin-links-for-coin-master-game-hack In PDF document text
- https://www.fluidtecheng.com/uploaded_files/userfiles/files/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
- https://www.fluidtecheng.com/uploaded_files/userfiles/files/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
- https://www.fluidtecheng.com/uploaded_files/userfiles/files/how-to-get-free-roblox-hair_GM431946152.pdfIn PDF document text
- https://www.fluidtecheng.com/uploaded_files/userfiles/files/free-spins-and-coins-coin-master-app_GM406889139.pdfIn PDF document text
- https://www.fluidtecheng.com/uploaded_files/userfiles/files/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
- https://www.fluidtecheng.com/uploaded_files/userfiles/files/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.fluidtecheng.com/uploaded_files/userfiles/files/coin-master-free-spins-2021-ios_GM406889139.pdfIn PDF document text
- https://www.fluidtecheng.com/uploaded_files/userfiles/files/coin-master-how-to-get-japan-sushi-card-free_GM406889139.pdfIn PDF document text
- https://www.fluidtecheng.com/uploaded_files/userfiles/files/roblox-games-with-free-boombox_GM431946152.pdfIn PDF document text
- https://www.fluidtecheng.com/uploaded_files/userfiles/files/coin-master-codes_GM406889139.pdfIn PDF document text
- https://www.fluidtecheng.com/uploaded_files/userfiles/files/how-long-is-the-minecraft-free-trial_GM479516143.pdfIn PDF document text
- https://www.fluidtecheng.com/uploaded_files/userfiles/files/coin-master-hack-com_GM406889139.pdfIn PDF document text
- https://www.fluidtecheng.com/uploaded_files/userfiles/files/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
- https://www.fluidtecheng.com/uploaded_files/userfiles/files/coin-master-free-spin-redeem-code_GM406889139.pdfIn PDF document text
- https://www.fluidtecheng.com/uploaded_files/userfiles/files/minecraft-hacker-mask_GM479516143.pdfIn PDF document text
- https://www.fluidtecheng.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
- https://www.fluidtecheng.com/uploaded_files/userfiles/files/inappropriate-roblox_GM431946152.pdfIn PDF document text
- https://www.fluidtecheng.com/uploaded_files/userfiles/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://www.fluidtecheng.com/uploaded_files/userfiles/files/free-spins-coin-master-without-survey_GM406889139.pdfIn PDF document text
- https://www.fluidtecheng.com/uploaded_files/userfiles/files/mobihack-roblox-hack_GM431946152.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_003_off00004981.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4981	24768 bytes
SHA-256: `90ecc0b3ec8aac63e1debab5a2e1b47014d50eb868dba4168ece7b4432ac8627`
`font_01_sfnt_off00008175.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8175	18056 bytes
SHA-256: `578cb632d29792d27323dbfb8f8c4e13070323ba88199216771f9de5c0a4a85a`

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