Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cc5c5dfc9b8ce92…

MALICIOUS

PDF

33.4 KB Created: 2021-07-10 01:35:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c56186f9c8de6784c980c81e9f24e943 SHA-1: c9f63b470830f9be7586ee4067c7d3a73a293058 SHA-256: 7cc5c5dfc9b8ce92188b2a83f416f4adb728d6424c354f5970ba37644901219e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic firing for a 'GAME_HACK_REDIRECT_LURE', indicating it directs users to a URL promising game hacks. The embedded URL 'http://netcdn.tw/app/431946152/rewardex-robux-game-hack' is the primary indicator of this lure. The document's content and the ML classifier further support its malicious nature, likely serving as a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/rewardex-robux-game-hack PDF link annotation
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/roblox-free-gift_GM431946152.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/how-to-hack-a-group-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/roblox-invitation-template-free_GM431946152.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/how-to-hack-in-roblox-prison-life-v20_GM431946152.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/hackear-coin-master-sin-root_GM406889139.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/cheat-codes-roblox-mad-city-money_GM431946152.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/pokemon-go-free-coins-2021_GM1094591345.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/free-minecraft-videos_GM479516143.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/pubg-uc-2021_GM1330123889.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/comment-hacker-roblox-jailbreak-youtube_GM431946152.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/roblox-deadzone-hacks_GM431946152.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/coin-master-hack-blogspot_GM406889139.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/coin-master-extra-spins_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.

FilenameKindSourceSize
font_00_sfnt_off00002b96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B96 22508 bytes
SHA-256: ffeb05557a0487e8f7847f3db82d4113fb64b525722501b88e204726499c4048
font_01_sfnt_off00005dfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DFB 18888 bytes
SHA-256: 91293037858cffd8c5c798d2cc565c67491c49817e17fbcdbb1a87a8cb6a8b7d