Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1a2575b9fa0d3bf…

MALICIOUS

PDF

33.9 KB Created: 2021-06-18 16:19:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d7e5f43a958664204788994a48758124 SHA-1: 4b828d21e7b885aec55f106ef18976bcb0e7a762 SHA-256: d1a2575b9fa0d3bf5a820ec1ed20d50af11d76b0890690baf4db0892a8a03515
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites offering 'game hacks' and 'free generators', which are common lures for malicious downloads. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags the infrastructure as known malicious. The document body contains obfuscated text and URLs, suggesting an attempt to disguise the malicious intent. No scripts were extracted from this sample, but the embedded URLs and the nature of the lures strongly indicate a phishing or malware distribution attempt.

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/roblox-anti-hack-game-hack In PDF document text
    • https://razredna-nastava.net/files/pubg-uc-meaning_GM1330123889.pdfIn PDF document text
    • https://razredna-nastava.net/files/app-store-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-roblox-promo-toy-keys_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/script-executor-roblox-free_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/pokemon-brick-bronze-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/master-coin-hack-mod_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-free-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-hack-today_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-free-spins-2021-today_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-apk-hack-32_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-spin-gratis-coin-master_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-earn-robux-for-free-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
stream_002_off00002e2e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E2E 22384 bytes
SHA-256: 83b99d1809e5496a4830a853bb94ab27128a4278aa150e45a90d636446be7e04
font_01_sfnt_off00005fcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCD 18880 bytes
SHA-256: 544fa1858b258645bc63c27f1a185d164c9f157b397bbf0805f2591869202c14

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