Malicious PDF — malware analysis report

Static analysis result for SHA-256 db254efe8a4e26ba…

MALICIOUS

PDF

35.2 KB Created: 2021-06-19 05:58:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c81d21cb9fb48d6e2a2c7154679f14d8 SHA-1: 2a0a05d9f33c115acb0cbd2b3298226e7acf087b SHA-256: db254efe8a4e26ba236327736b3fbdee03610613b11b686d20f42a3a6b76af0d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, disguised as 'free generator / game hack' lures. The document body and embedded URLs reinforce this theme, aiming to trick users into visiting malicious sites. The ML classifier also strongly indicated maliciousness.

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/free-robux-no-hacks-roblox-approved-game-hack In PDF document text
    • https://javexglobal.com/image/data/files/coin-master-website_GM406889139.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/coin-master-free-spins-app-android_GM406889139.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/minecraft-alt-accounts-free_GM479516143.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/free-coin-master-cards-link_GM406889139.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/coin-master-hack-quora_GM406889139.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/robux-websites-that-work_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/mod-roblox-hack_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/gear-giver-roblox-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/robux-hack-tools_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/free-spins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/gamehunters-coin-master_GM406889139.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/100-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/robux-generators-that-actually-work_GM431946152.pdfIn PDF document text
    • https://javexglobal.com/image/data/files/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 5

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_off00002f10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F10 23088 bytes
SHA-256: d6e072b64cd4e1bc6dbefe16e8bbff24d495d598ac341965b529aa712107e555
font_01_sfnt_off0000635c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x635C 19424 bytes
SHA-256: b276c68a866b68731abdead8aae9873051a39e27eb8363f88f1b9b2b97b4eab0

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