Malicious PDF — malware analysis report

Static analysis result for SHA-256 42524e78ab4bcdf9…

MALICIOUS

PDF

35.3 KB Created: 2021-05-25 09:01:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 80aca4604a61752e1fcf020b15bd4f0a SHA-1: a35a6647b8c52f0e0aa6f191054f0f24bd58a736 SHA-256: 42524e78ab4bcdf9692477f1605043c375260db529e2102448ac6541a357dd9d
170 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to malicious infrastructure. It also includes a social engineering heuristic indicating instructions to bypass macro restrictions by tricking users into running commands. The embedded URL is associated with known malicious redirectors, suggesting an attempt to deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier clean score 0.0718

Heuristics 5

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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/479516143/minecraft-pe-free-download-ios-no-jailbreak-game-hack In 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_off00002db6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2DB6 25252 bytes
SHA-256: ed20699d544f05058eef887b5da875de69529062a7301b5d85663005854494c3
font_01_sfnt_off00006704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6704 18940 bytes
SHA-256: 384c56943b2f0ce7dd032d42d48bdddf0ac3b313714fbbfa672311f45c441041

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