Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0f6e527f22788aa…

MALICIOUS

PDF

42.6 KB Created: 2021-05-12 03:43:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5b7b4f962a0d3133814897e78d093ca7 SHA-1: 2be6de660bfea92e7507532c27fe4b3fcbdda40b SHA-256: a0f6e527f22788aa9cf9c149fb4618b1c651e3340ba66f648a3e27080e8e14c9
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a QR-code lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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 https://netcdn.xyz/app/479516143/minecraft-games-online-free-no-download-game-hack PDF link annotation
    • https://admin.9credit.vn/data/files/roblox-account-taker_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/free-robux-ad_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/coin-master-on-facebook_GM406889139.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/best-free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/coin-master-spin-ml_GM406889139.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/coin-master-32-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/haktuts-coin-master-today_GM406889139.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/daily-coin-master-free-spin-link-facebook_GM406889139.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/roblox-play-now-for-free_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/coin-master-free-spins-generator_GM406889139.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/free-bling-bling-card-coin-master_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_off00004b6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B6E 24836 bytes
SHA-256: 74632c4d29948c9fdcd6d6c37e7354f0c11f51dad2a5aeecd30e5b5b4888a757
font_01_sfnt_off00008378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8378 18548 bytes
SHA-256: 5ca17b28647aef81bcc84b8dc260964849d2cd995c521d110ee9368522ce90b7

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