Malicious PDF — malware analysis report

Static analysis result for SHA-256 53c84d28bfc33668…

MALICIOUS

PDF

34.8 KB Created: 2021-07-03 19:27:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c6d26110dbf8dd1719ab48134ad75672 SHA-1: d6ca1b9afce36b4746dd826f815f2ed79621f1ab SHA-256: 53c84d28bfc33668662096b5209d94fa5dc757dc5da29e0204ac64d5b84f022d
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are presented as generators or hacks for popular games like Roblox and Minecraft. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these links, suggesting a link farm designed to attract users with deceptive promises. The primary lure appears to be related to obtaining free in-game currency or items, a common tactic for phishing or scam operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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/479516143/is-minecraft-free-on-xbox-one-game-hack PDF link annotation
    • https://javexglobal.com/image/data/files/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/roblox-verification_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/roblox-free-obc-lifetime-code_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/pubg-uc-hack_GM1330123889.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/pokemon-go-free-candy-cheat_GM1094591345.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/coin-master-free-100-spin-link_GM406889139.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/can-you-earn-robux_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/hack-for-one-piece-open-seas-roblox_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/hack-a-game_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/roblox-project-pokemon-dll-hack_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/how-to-get-free-robux-legit-2021_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/paginas-hack-para-conseguir-robux_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/moon-tycoon-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/how-to-install-minecraft-for-free-on-ios_GM479516143.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/roblox-jailbreak-speed-hack-2021_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_off000032b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32B9 22512 bytes
SHA-256: 446be4a17b2d4c4f4adb6ddbe5631dc677cb9298e4b8d25151d25d241ca97f23
font_01_sfnt_off00006489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6489 18596 bytes
SHA-256: 987f99d7e2443cf381540eae1143ad62299bf58b05908f5564068197b2bc8841

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