Malicious PDF — malware analysis report

Static analysis result for SHA-256 42add73733f47ed2…

MALICIOUS

PDF

43.9 KB Created: 2021-06-08 10:28:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5def2e1f71ad61674cb9e68467368803 SHA-1: bde9e0a133f81f15a0339bee94ae089bfef0b07d SHA-256: 42add73733f47ed21a6980731cf934e88625363ba04141bd7631e89a09abf362
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple links to redirector domains, specifically advertising game hacks and generators. One prominent URL, 'https://netcdn.tw/app/431946152/devil-roblox-hack-game-hack', is identified as a malicious redirector. The document body, though partially obfuscated, also contains this URL and other similar links, reinforcing the lure-based attack pattern. No scripts were extracted, but the presence of malicious links and the nature of the lures strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/devil-roblox-hack-game-hack In PDF document text
    • http://eurosystemssrl.it/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://eurosystemssrl.it/images/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://eurosystemssrl.it/images/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • http://eurosystemssrl.it/images/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://eurosystemssrl.it/images/coin-master-hack-version-2021-download_GM406889139.pdfIn PDF document text
    • http://eurosystemssrl.it/images/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/como-hackear-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://eurosystemssrl.it/images/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/minecraft-windows-10-edition-free_GM479516143.pdfIn PDF document text
    • http://eurosystemssrl.it/images/minecraft-login-free_GM479516143.pdfIn PDF document text
    • http://eurosystemssrl.it/images/roblox-free-clothes-generator_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/minecraft-xbox-free_GM479516143.pdfIn PDF document text
    • http://eurosystemssrl.it/images/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://eurosystemssrl.it/images/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://eurosystemssrl.it/images/tiktok-free-fans_GM835599320.pdfIn PDF document text
    • http://eurosystemssrl.it/images/minecraft-bedrock-edition-download-pc-free_GM479516143.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_off00004deb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DEB 25312 bytes
SHA-256: ff6135e2b47f3306b78f73c51d8e5f61eb5c516a1f0e5656a96ab1253a34140b
font_01_sfnt_off000087d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87D2 18584 bytes
SHA-256: 1354ac25dde6cc54054fb0773e47f8a7c6593b8b3d3d918e1f6f55d5d07e5a09

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