Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae5f4ae99d375820…

MALICIOUS

PDF

34.4 KB Created: 2021-07-09 19:26:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 05d585cee38be47bf65a41b827ffad9b SHA-1: 725d3c5d5552e024ef68cabe85506ae910b5a58a SHA-256: ae5f4ae99d3758200f5df1e42e74760070f476038574046fccb9c2dd7ef3d523
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for free Robux and game hacks, directing users to a known malicious redirector. The embedded URLs and document body content strongly suggest a phishing or scam attempt to trick users into visiting malicious sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/roblox-cheat-robux-game-hack In PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/how-to-get-free-robux-ez-ways_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/free-robux-wihout-human-verification-or-downloads_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/how-to-get-free-robux-working-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/hack-de-roblox-deathrun-descargar_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/how-to-get-free-clothes-on-roblox-nbc_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/how-to-cheat-on-roblox-giant-dance-off_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/how-to-get-your-hacked-roblox-account-back-with-coding_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/robux-free-gift-card-org_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/how-do-you-hack-accounts-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/free-bird-roblox-id_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/how-do-u-get-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/get-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/free-roblox-exploit-executor_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/gamesofficenet-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/how-to-get-free-robux-without-scams_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/roblox-hacks-veiculos-simulator_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/how-to-get-free-robux-without-waiting_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/games-like-bloxburg-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.ventureit.com.sg/uploaded_files/userfiles/files/how-t-hack-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.

FilenameKindSourceSize
font_00_sfnt_off00003068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3068 22260 bytes
SHA-256: dfd9c1697e19eb2efbcd1b09ed26ddd54ea45d2485389d5a7a3bd8f08b2f7f7f
font_01_sfnt_off000061d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D6 18896 bytes
SHA-256: 922389806b7f491697ff28620e7b275538dde8f96f9a13fe3cb104b646346471

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