PDF malware analysis — malicious · e8f6ae44d41960c2

MALICIOUS

PDF

41.0 KB Created: 2021-05-13 11:09:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16

MD5: 85cfe7aa8f5df5b1dbb5166c0f52e320 SHA-1: ec94f0baa1bc2f343f97fba4fba7c7d6f0b22f16 SHA-256: e8f6ae44d41960c2a5ca27aadf8b49c7498da652b698d18746a94eff298c9fad

260 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains numerous links, including one pointing to a known malicious redirector, designed to lure users into clicking on potentially harmful content related to game hacks and free in-game currency. The document also displays a fake CAPTCHA, a common social engineering tactic to trick users into performing actions that could lead to exploitation or further malware delivery. The presence of multiple links to external PDF files suggests a link farm or SEO manipulation tactic to distribute malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

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.
Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA

Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
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/roblox-heroes-online-game-hack In PDF document text
- http://uas.com.my/uploaded_files/userfiles/files/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- http://uas.com.my/uploaded_files/userfiles/files/coin-master-code-for-free-spins_GM406889139.pdfIn PDF document text
- http://uas.com.my/uploaded_files/userfiles/files/daily-free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
- http://uas.com.my/uploaded_files/userfiles/files/roblox-free-printables_GM431946152.pdfIn PDF document text
- http://uas.com.my/uploaded_files/userfiles/files/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
- http://uas.com.my/uploaded_files/userfiles/files/coin-master-hack-download-android_GM406889139.pdfIn PDF document text
- http://uas.com.my/uploaded_files/userfiles/files/robloxfun-com-robux_GM431946152.pdfIn PDF document text
- http://uas.com.my/uploaded_files/userfiles/files/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
- http://uas.com.my/uploaded_files/userfiles/files/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
- http://uas.com.my/uploaded_files/userfiles/files/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
- http://uas.com.my/uploaded_files/userfiles/files/how-to-get-robux-on-roblox_GM431946152.pdfIn PDF document text
- http://uas.com.my/uploaded_files/userfiles/files/coin-master-hack-apk_GM406889139.pdfIn PDF document text
- http://uas.com.my/uploaded_files/userfiles/files/robux-fun-hack_GM431946152.pdfIn PDF document text
- http://uas.com.my/uploaded_files/userfiles/files/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
- http://uas.com.my/uploaded_files/userfiles/files/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
- http://uas.com.my/uploaded_files/userfiles/files/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
- http://uas.com.my/uploaded_files/userfiles/files/coins-master_GM406889139.pdfIn PDF document text
- http://uas.com.my/uploaded_files/userfiles/files/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
- http://uas.com.my/uploaded_files/userfiles/files/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
- http://uas.com.my/uploaded_files/userfiles/files/get-free-coins-for-coin-master_GM406889139.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_off00004765.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4765	24240 bytes
SHA-256: `e166cae23c79727700278f35de43b0af59fac8cfea59f74479185d81d1024a22`
`font_01_sfnt_off00007eef.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7EEF	17904 bytes
SHA-256: `b7f11a2df82e7930abe2842f58c991707f2f159cab445d86aa6820b01792cbd7`

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