PDF malware analysis — malicious · 77e2787f242f5eaa

MALICIOUS

PDF

46.7 KB Created: 2021-06-09 01:32:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16

MD5: 94ce69ab396f24834814b6c25f0936f0 SHA-1: 18dfb57d64b2c20880b37722233f56ea99b4ab9c SHA-256: 77e2787f242f5eaac1da067e80816be13d824f4aae58f356d2854177a99d2481

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document employs a common lure for game-related cheats and currency, directing users to a malicious redirector. The redirector, in turn, serves further lures and potentially malicious PDFs hosted on the heilzentrum-ulm.de domain. The ML classifier strongly indicates malicious intent, and the presence of multiple links to known malicious infrastructure confirms a phishing or scamming campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9832

Heuristics 4

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.
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.tw/app/431946152/roblox-bee-swarm-simulator-script-gui-free-bees-game-hack In PDF document text
- http://heilzentrum-ulm.de/images/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/free-robux-instantly-2021_GM431946152.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/roblox-free-rubox_GM431946152.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/roblox-18_GM431946152.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/free-minecraft-skins-xbox-one_GM479516143.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/free-minecraft-svg-cutting-files_GM479516143.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/free-minecraft-server_GM479516143.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/free-mods-for-coin-master_GM406889139.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/free-robux-generator_GM431946152.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/roblox-elemental-battlegrounds-hacks-win10-2021_GM431946152.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/free-robux-promo-codes-2021-not-expired-november_GM431946152.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/roblox-legends-of-speed-hack-pain-exist_GM431946152.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/free-robux-easy_GM431946152.pdfIn PDF document text
- http://heilzentrum-ulm.de/images/como-hackear-los-robux-de-roblox_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_off000052c8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x52C8	28364 bytes
SHA-256: `5ecdb523180af27a3bb49a678c62598c64993624488b2c577f634a5ff8cd2919`
`font_01_sfnt_off00009183.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9183	19140 bytes
SHA-256: `cfa625b7002187db4d1c37a707feccad2c322c503ae3ad225998998299cdf50f`

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