Malicious PDF — malware analysis report

Static analysis result for SHA-256 261672260196fb1c…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 13:55:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 546ae6adaea0548f6cdc1943e8b1b0f2 SHA-1: 097bea2ec3793009dcfa266e65b302ac63d81c19 SHA-256: 261672260196fb1c1c03a61d243183df5aeeb10fb6a3aa27fa5be056714160c2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically advertising 'game hacks' and 'generators'. The primary redirector URL is http://netcdn.tw/app/1330123889/app-for-pubg-uc-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering tactic to trick users into downloading potentially unwanted or malicious software. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9652

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.tw/app/1330123889/app-for-pubg-uc-game-hack In PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/como-hackear-robux-verdadero-no-fail_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/master-coin-hack-app_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-gift-card-pw-robux_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/flip-master-free-coins_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/roblox-speeed-hack_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-free-spins-and-coins-today_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/hack-for-hoops-beta-roblox_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-nike-pants-roblox_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-hack-roblox-one-punch-man_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/roblox-free-tbc-twitter_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/hack-robux-free-2021_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-make-a-free-robux-scam_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-free-spins-daily-2021_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/pokemon-go-free-online-play_GM1094591345.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-things-on-roblox_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-free-spins-link-download-for-iphone_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_001_off00002784.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2784 22108 bytes
SHA-256: 43862325d69bcf2f47bbddae9b1f5086c485102279dc25d4e783f7c2d8e17387
font_01_sfnt_off000058aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58AA 2812 bytes
SHA-256: fc92a80cefddbcc51cb4ecd7284aa73b746cbd66adcf1d96110f0323ec06b51f
font_02_sfnt_off0000624a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x624A 18608 bytes
SHA-256: 2316edc3aefdd18b8bf8731ed4d0814347fadd1f0f2090b1893752d7d0d657c1

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