PDF malware analysis — malicious · efaeb3f02a101969

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 05:27:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16

MD5: 1856a4f589c846a448d2bc9777b2f609 SHA-1: 6da54d8f4cbd66ce915a68af0a053b0ac0cd12f7 SHA-256: efaeb3f02a10196984b843b61692002d2f0ae9eb2c6511a865f01f7ea37391d0

260 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 hacks or generators. These links redirect to malicious infrastructure, indicating a phishing or scam attempt. The presence of multiple SEO-optimized PDF links suggests an attempt to distribute malicious content broadly. No scripts were extracted, but the document's structure and embedded links strongly indicate a phishing or scam campaign.

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.
LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND

Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
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/free-robux-group-payouts-game-hack In PDF document text
- http://www.library.umbjm.ac.id/repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
- http://www.library.umbjm.ac.id/repository/coin-master-mod-apk-free-download-for-android_GM406889139.pdfIn PDF document text
- http://www.library.umbjm.ac.id/repository/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
- http://www.library.umbjm.ac.id/repository/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
- http://www.library.umbjm.ac.id/repository/free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
- http://www.library.umbjm.ac.id/repository/minecraft-pe-017-0-apk-free-download-android_GM479516143.pdfIn PDF document text
- http://www.library.umbjm.ac.id/repository/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
- http://www.library.umbjm.ac.id/repository/free-pet-food-for-coin-master_GM406889139.pdfIn PDF document text
- http://www.library.umbjm.ac.id/repository/can-simeone-hack-your-roblox-account-theough-discord_GM431946152.pdfIn PDF document text
- http://www.library.umbjm.ac.id/repository/dragon-ball-z-hack-roblox_GM431946152.pdfIn PDF document text
- http://www.library.umbjm.ac.id/repository/daily-spin-and-coin_GM406889139.pdfIn PDF document text
- http://www.library.umbjm.ac.id/repository/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
- http://www.library.umbjm.ac.id/repository/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
- http://www.library.umbjm.ac.id/repository/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
- http://www.library.umbjm.ac.id/repository/cmd-robux-hack-real-robux_GM431946152.pdfIn PDF document text
- http://www.library.umbjm.ac.id/repository/is-java-minecraft-free_GM479516143.pdfIn PDF document text
- http://www.library.umbjm.ac.id/repository/how-can-i-get-robux_GM431946152.pdfIn PDF document text
- http://www.library.umbjm.ac.id/repository/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
- http://www.library.umbjm.ac.id/repository/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
- http://www.library.umbjm.ac.id/repository/free-coins-coin-master-spins_GM406889139.pdfIn PDF document text
- http://www.libraryIn macro / runtime command snippet
- 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_off00002ff9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2FF9	22572 bytes
SHA-256: `dbaeb6c82f4e12aaa1f841949da17ccf66b8aaebc13141804c9913ec7264ff8d`
`font_01_sfnt_off00006210.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6210	19332 bytes
SHA-256: `037bae83bb889f51f40ee04106dd8c63976853147050f5621b1f1569a1c37875`

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