Malicious PDF — malware analysis report

Static analysis result for SHA-256 39023ea8daa9257b…

MALICIOUS

PDF

45.0 KB Created: 2021-06-10 21:39:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: b06237c5f26735754507500b4c96fdde SHA-1: 6ad97bca9d10dd9b1c5b772e14b43a82891d9d06 SHA-256: 39023ea8daa9257bb28b7b5e1fedb3e322fe2e5484b7522a05d05c1eb4fbcb0c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, masquerading as generators for free in-game currency or hacks. The primary lure is for Roblox and Coin Master, with the document body and embedded links pointing to URLs designed to trick users into clicking. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/how-to-get-free-bc-on-roblox-2021-game-hack In PDF document text
    • https://balibalotour.com/new/public/ckfinder/userfiles/files/free-coin-master-spins-blogger_GM406889139.pdfIn PDF document text
    • https://balibalotour.com/new/public/ckfinder/userfiles/files/free-roblox-hair-to-wear_GM431946152.pdfIn PDF document text
    • https://balibalotour.com/new/public/ckfinder/userfiles/files/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://balibalotour.com/new/public/ckfinder/userfiles/files/hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://balibalotour.com/new/public/ckfinder/userfiles/files/coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • https://balibalotour.com/new/public/ckfinder/userfiles/files/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://balibalotour.com/new/public/ckfinder/userfiles/files/free-roebucks-com_GM431946152.pdfIn PDF document text
    • https://balibalotour.com/new/public/ckfinder/userfiles/files/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • https://balibalotour.com/new/public/ckfinder/userfiles/files/coin-master-free-spins-a2z-help_GM406889139.pdfIn PDF document text
    • https://balibalotour.com/new/public/ckfinder/userfiles/files/download-free-cool-roblox-outfits-for-man_GM431946152.pdfIn PDF document text
    • https://balibalotour.com/new/public/ckfinder/userfiles/files/coin-master-hacks-and-cheats_GM406889139.pdfIn PDF document text
    • https://balibalotour.com/new/public/ckfinder/userfiles/files/wurst-115-2_GM479516143.pdfIn PDF document text
    • https://balibalotour.com/new/public/ckfinder/userfiles/files/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • https://balibalotour.com/new/public/ckfinder/userfiles/files/free-robux-working_GM431946152.pdfIn PDF document text
    • https://balibalotour.com/new/public/ckfinder/userfiles/files/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • https://balibalotour.com/new/public/ckfinder/userfiles/files/how-to-get-free-faces-on-roblox_GM431946152.pdfIn PDF document text
    • https://balibalotour.com/new/public/ckfinder/userfiles/files/roblox-how-to-play-welcome-to-bloxburg-for-free-2021_GM431946152.pdfIn PDF document text
    • https://balibalotour.com/new/public/ckfinder/userfiles/files/coinmaster-twitter_GM406889139.pdfIn PDF document text
    • https://balibalotour.com/new/public/ckfinder/userfiles/files/hack-robux-cheat-engine-61_GM431946152.pdfIn PDF document text
    • https://balibalotour.com/new/public/ckfinder/userfiles/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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_off000051a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51A9 26172 bytes
SHA-256: c7e6f3fd0be87b404f0ea502a88ea6c9b6500ba06b831802d6d3347577c5ef77
font_01_sfnt_off00008bf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF7 18620 bytes
SHA-256: 7dfdd745181b47fe57b79b1fcbbb884c35bdaa1411da128fec1478bf27bbd7fc

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