PDF malware analysis — malicious · 429a96a13ac40cae

MALICIOUS

PDF

35.1 KB Created: 2021-07-05 01:59:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21

MD5: f4a5999af6fefe585f6dae462c1979d1 SHA-1: f4ea21bc84f965f4a65f10f7e36391373f0900c7 SHA-256: 429a96a13ac40cae8bf9a4855361097808b1e0911528312d6f4b302c5be27ff2

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous links, including one to a known malicious redirector, that promise free game currency or hacks. The document body and heuristic firings indicate a lure for users to click these links, likely leading to phishing sites or malware downloads. No scripts were extracted, but the overall structure suggests a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/roblox-free-robux-no-human-verification-game-hack In PDF document text
- http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
- http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
- http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/wall-hack-cs-go-roblox_GM431946152.pdfIn PDF document text
- http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/cute-free-roblox-clothes_GM431946152.pdfIn PDF document text
- http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/how-to-o-get-free-coin-master-spins_GM406889139.pdfIn PDF document text
- http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/how-to-get-minecraft-java-for-free_GM479516143.pdfIn PDF document text
- http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/hire-a-free-roblox-scripter_GM431946152.pdfIn PDF document text
- http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/the-labirynth-free-vip-server-roblox_GM431946152.pdfIn PDF document text
- http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/roblox-hack-999999-robux-2021_GM431946152.pdfIn PDF document text
- http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/roblox-inappropriate_GM431946152.pdfIn PDF document text
- http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/can-pokemon-go-free-account-2021_GM1094591345.pdfIn PDF document text
- http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
- http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
- http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/how-to-get-2021-robux-for-free-2021_GM431946152.pdfIn PDF document text
- http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
- http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/cheats-for-getting-money-in-roblox-meep-city_GM431946152.pdfIn PDF document text
- http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/free-robux-hack_GM431946152.pdfIn PDF document text
- http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/free-draw-roblox_GM431946152.pdfIn PDF document text
- http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/hack-jailbreak-2021-roblox_GM431946152.pdfIn PDF document text
- http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/free-robux-generator-no-human-verification-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_off00003154.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3154	22424 bytes
SHA-256: `e268d2a9151c62c1e10b90a8794ba5e3640a8ef0c6cd472a713ed303a7f7da00`
`font_01_sfnt_off00006329.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6329	19408 bytes
SHA-256: `d2ef309b92771ae7bb099a6b634574daefb8445dd777fce633f2a8c245e3903e`

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