Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c61565ff334620c…

MALICIOUS

PDF

34.1 KB Created: 2021-06-30 14:17:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 1fac530fe0974464c727c9ff3a457724 SHA-1: bedcc9cb3d21afcd96d4c16ac19547de66bc0434 SHA-256: 3c61565ff334620c71384cd58235230c6e9b8d7c5c46dbdfb9e9c1d06fc6937a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a known malicious redirector at http://netcdn.co/app/431946152/all-roblox-hack-scripts-game-hack. The document body and embedded links suggest a lure for game hacks or cheats, which is a common tactic for distributing malware. The presence of a visual download button further supports the malicious intent.

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.co/app/431946152/all-roblox-hack-scripts-game-hack In PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/how-to-get-free-robux-on-computer-no-hack_GM431946152.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/pocket-pirates-roblox-cheat_GM431946152.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/working-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/how-to-speed-hack-on-roblox-without-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/pubg-uc-and-skins-smm-panel_GM1330123889.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/robux-hack-no-download-no-survey-no-human-verification_GM431946152.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/how-to-get-free-robux-on-roblox-zephplayz_GM431946152.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/legit-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/roblox-cheat-unknwocnehats_GM431946152.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/coin-master-blogspot_GM406889139.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://flyingchalks.com/ckfinder/userfiles/files/free-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3066 21664 bytes
SHA-256: 4f240635ac67111c4bdaf7c379168d179c9e6638b18565209d1a8dcc4f635e7a
font_01_sfnt_off00005ffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FFE 19056 bytes
SHA-256: 45d37005f30ca24e639b80d314f4039b21dbdd398d4caa5e3b777f39dd19b14a

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