PDF malware analysis — malicious · 609d42d8d0ba9291

MALICIOUS

PDF

34.6 KB Created: 2021-07-04 11:17:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13

MD5: d8077ddd433398e25a0cf9fe04ad1660 SHA-1: aa87b52caff7b3b2d55714d0b70601d5407c6ba3 SHA-256: 609d42d8d0ba9291b911aebd5f354dac1ad1f6772ee4106e34453cb401efb68a

260 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded links designed to lure users into clicking on them by promising free game currency or hacks. The links point to redirectors and other PDF files hosted on external domains, indicating a likely phishing or scam campaign. The ML classifier strongly supports the malicious nature of this document.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 6

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.
Invisible PDF links to CAPTCHA-themed web lure high PDF_CAPTCHA_LINK_LURE

PDF contains invisible clickable link annotations that point to a CAPTCHA/capcha-themed web path. This is a common phishing and ClickFix-style routing pattern: the PDF itself is inert, while the linked page performs the credential prompt or fake verification.
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 http://netcdn.tw/app/431946152/make-free-robux-game-hack In PDF document text
- http://alsworld.com/uploaded_files/userfiles/files/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
- http://alsworld.com/uploaded_files/userfiles/files/free-robux-promo-codes-2021-november_GM431946152.pdfIn PDF document text
- http://alsworld.com/uploaded_files/userfiles/files/roblox-install-free_GM431946152.pdfIn PDF document text
- http://alsworld.com/uploaded_files/userfiles/files/free-robux-gen-no-verification_GM431946152.pdfIn PDF document text
- http://alsworld.com/uploaded_files/userfiles/files/free-robux-captcha_GM431946152.pdfIn PDF document text
- http://alsworld.com/uploaded_files/userfiles/files/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
- http://alsworld.com/uploaded_files/userfiles/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
- http://alsworld.com/uploaded_files/userfiles/files/roblox-its-raining-men-hack_GM431946152.pdfIn PDF document text
- http://alsworld.com/uploaded_files/userfiles/files/coin-master-spin-link-free-download_GM406889139.pdfIn PDF document text
- http://alsworld.com/uploaded_files/userfiles/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
- http://alsworld.com/uploaded_files/userfiles/files/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
- http://alsworld.com/uploaded_files/userfiles/files/how-to-get-bc-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
- http://alsworld.com/uploaded_files/userfiles/files/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
- http://alsworld.com/uploaded_files/userfiles/files/free-robux-human-verification_GM431946152.pdfIn PDF document text
- http://alsworld.com/uploaded_files/userfiles/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
- http://alsworld.com/uploaded_files/userfiles/files/how-to-install-minecraft-for-free-on-ios_GM479516143.pdfIn PDF document text
- http://alsworld.com/uploaded_files/userfiles/files/how-to-make-pants-for-free-in-roblox_GM431946152.pdfIn PDF document text
- http://alsworld.com/uploaded_files/userfiles/files/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
- http://alsworld.com/uploaded_files/userfiles/files/fps-hacks-roblox-aimbot-not-pf-v20_GM431946152.pdfIn PDF document text
- http://alsworld.com/uploaded_files/userfiles/files/roblox-jailbreak-hack-how-to-through-walls-hack-new-2021_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
`font_00_sfnt_off000030a3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x30A3	22312 bytes
SHA-256: `dbb7ed1bbc000cf7294ef46f79f0acbc8a017df23de01b92b57af6a608499ce3`
`font_01_sfnt_off0000623b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x623B	19084 bytes
SHA-256: `480c89487a14742f7141225872d5c58d3fe4f75b5aa5747387f60334adf20675`

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