Malicious PDF — malware analysis report

Static analysis result for SHA-256 98399989636c79d8…

MALICIOUS

PDF

36.0 KB Created: 2021-06-17 20:20:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 4777b09bb0609f81f06f181ff3082252 SHA-1: 6a61567cb4ce9647be6ddbbca86fe241b420dec2 SHA-256: 98399989636c79d8ae117f9e49fac00c8990ee144de754bedb9b8bc424d9d0af
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links disguised as game hacks and generators, specifically targeting Roblox players. The primary link directs to a known malicious redirector infrastructure. This suggests the document is part of a phishing or malware distribution campaign, likely using a spearphishing attachment as the initial access vector. No scripts were extracted, but the embedded URLs and link farm indicate a strong intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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.co/app/431946152/how-to-change-your-roblox-name-for-free-2021-game-hack In PDF document text
    • https://futureselect.com.au/wp-content/uploads/fsqm-files/roblox-be-a-parkour-ninja-hack_GM431946152.pdfIn PDF document text
    • https://futureselect.com.au/wp-content/uploads/fsqm-files/cheat-roblox-granny_GM431946152.pdfIn PDF document text
    • https://futureselect.com.au/wp-content/uploads/fsqm-files/artificial-intelligence-roblox-hack-streets-void_GM431946152.pdfIn PDF document text
    • https://futureselect.com.au/wp-content/uploads/fsqm-files/roblox-robux-generator-hack-2021-zn-game-online_GM431946152.pdfIn PDF document text
    • https://futureselect.com.au/wp-content/uploads/fsqm-files/roblox-robux-hack-no-servey-or-human-vervcation_GM431946152.pdfIn PDF document text
    • https://futureselect.com.au/wp-content/uploads/fsqm-files/free-robux-for-roblox-cheats-and-guide_GM431946152.pdfIn PDF document text
    • https://futureselect.com.au/wp-content/uploads/fsqm-files/free-robux-rbx-tools_GM431946152.pdfIn PDF document text
    • https://futureselect.com.au/wp-content/uploads/fsqm-files/roblox-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://futureselect.com.au/wp-content/uploads/fsqm-files/how-to-get-free-coins-on-tiktok_GM835599320.pdfIn PDF document text
    • https://futureselect.com.au/wp-content/uploads/fsqm-files/roblox-steves-one-piece-hack-steve-shift_GM431946152.pdfIn PDF document text
    • https://futureselect.com.au/wp-content/uploads/fsqm-files/free-roblox-card-code-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • https://futureselect.com.au/wp-content/uploads/fsqm-files/free-roblox-gift-card-codes-2021-may_GM431946152.pdfIn PDF document text
    • https://futureselect.com.au/wp-content/uploads/fsqm-files/roblox-script-hack-get-everything_GM431946152.pdfIn PDF document text
    • https://futureselect.com.au/wp-content/uploads/fsqm-files/mad-city-script-roblox-download-free_GM431946152.pdfIn PDF document text
    • https://futureselect.com.au/wp-content/uploads/fsqm-files/script-free-robux_GM431946152.pdfIn PDF document text
    • https://futureselect.com.au/wp-content/uploads/fsqm-files/boost-free-robux_GM431946152.pdfIn PDF document text
    • https://futureselect.com.au/wp-content/uploads/fsqm-files/roblox-beyond-free-vip-server_GM431946152.pdfIn PDF document text
    • https://futureselect.com.au/wp-content/uploads/fsqm-files/roblox-hack-intitle-indexof_GM431946152.pdfIn PDF document text
    • https://futureselect.com.au/wp-content/uploads/fsqm-files/roblox-pizza-cheat_GM431946152.pdfIn PDF document text
    • https://futureselect.com.au/wp-content/uploads/fsqm-files/sfx-roblox-hack_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_off000033a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33A5 22420 bytes
SHA-256: 2e8036b8060e81f240ef8a49b91b77cec3b9777fb561a288346b049020a67905
font_01_sfnt_off000065be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65BE 19756 bytes
SHA-256: 03d330b827d97ef7f4313637d9d5e364c821e73a74749d16256e42eb1fcd1bcb