Malicious PDF — malware analysis report

Static analysis result for SHA-256 87434e67732b03c7…

MALICIOUS

PDF

39.6 KB Created: 2021-05-23 10:53:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9c8eb82255ef2bee1e28510b48aa04e3 SHA-1: 79c62751ff60c11db9e610f79235fab8b745d0e2 SHA-256: 87434e67732b03c7d541a2316daefae4413e1934fb8f030f484071b868ece624
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites offering free in-game currency, such as 'free Robux' and 'free spins', which are common lures for phishing and scamming operations. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://netcdn.xyz/app/431946152/free-robux-easy-game-hack'. The document body also contains this URL and a call-to-action phrase, reinforcing the malicious intent. Although no scripts were explicitly extracted, the PDF structure itself facilitates the redirection, aligning with T1059.007 (JavaScript) if any embedded actions were present, and T1566.001 (Spearphishing Attachment) due to the nature of the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9476

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.xyz/app/431946152/free-robux-easy-game-hack In PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-no-verification-code_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/robuxglobalcom_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/free-robux-pins_GM431946152.pdfIn PDF document text
    • https://www.micIn 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_off00003340.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3340 30164 bytes
SHA-256: 9ec8e2dba205a6485b156f5b082e6fd6ab1de3243ed0ede48bb8569b3a35764d
font_01_sfnt_off0000791f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x791F 18420 bytes
SHA-256: 93fb4fe90c413bceeeea5373daaca89ae05c83417e443247d622c1bd09cfd34e

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