Malicious PDF — malware analysis report

Static analysis result for SHA-256 469903e4a4a995f5…

MALICIOUS

PDF

34.4 KB Created: 2021-07-01 05:15:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: afc7b0b8acb45387d07c6c564b84b46e SHA-1: dc20832847930adb9965bfc83a3a1d023588d19a SHA-256: 469903e4a4a995f5652a739653e96b5e43004ebb5a2c4be3d8169359c3ec59b5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple embedded URLs that redirect to malicious infrastructure, specifically advertising 'game hacks' and 'free accounts' for popular games. The primary lure URL is http://netcdn.co/app/431946152/how-to-use-money-hack-in-roblox-any-game-game-hack, which is flagged as a malicious redirector. The document body, though partially corrupted, contains similar lure text and URLs, reinforcing the social engineering aspect. No scripts were extracted, but the presence of malicious links and the lure suggest an attempt to trick users into visiting compromised sites, likely for malware delivery or phishing.

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/how-to-use-money-hack-in-roblox-any-game-game-hack In PDF document text
    • https://razredna-nastava.net/files/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/hack-jailbreak-roblox-2021-rocketfull_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-inject-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-roblox-plaza-money_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-devil_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-com-free-for-mobile_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/get-free-spins-on-coin-master-links_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/robux-link_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/best-hack-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/optifine-pe_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-script-executor-free-s1prit_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-free-robux_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/minecraft-free-apk-java-edition_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_off00002f9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F9B 22112 bytes
SHA-256: a33a56341e1271bf61d68672f95fd861079749361b5a8d452909a028e7172c09
font_01_sfnt_off00006039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6039 19456 bytes
SHA-256: 6b08273a0ff15bffb689c30bb18a63d5496d516e8d03fc2ecb06f9fd63af822c

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